Short answer: for a single-bore bedroom, office, or garage-to-house door, the Sifely S is the best smart lock for interior doors overall. For a deadbolt-prepared door or one that needs a lever instead of a knob, the Veise KS02B and the GEKRONE T190 cover you, and those two door types decide most of the outcome in this guide.
The confusion starts because interior doors are not one thing. A bedroom door is usually a single-bore door with a spring latch and a plain knob. A home office or wine cellar door may have a deadbolt. A garage-to-house door often has a one-piece handle and lock combined, which almost no smart lever will accept. Buy for the door you actually have, not for the lock you wish you had.
We spent weeks putting ten smart locks for interior doors through the same routine: measuring the bore, timing the install, checking how many access methods genuinely work offline, and checking what breaks when the battery dies. This guide covers the ten that made the cut, plus the fit and hub details that decide whether a lock is usable at all.
If you want the wider picture first, our general smart lock roundup covers front-door and retrofit hardware in more depth. This page stays on the inside of the house.
Table of Contents
Top 3 Picks for Interior Doors (October 2026)
Sifely S Fingerprint Smart Lock
- Fingerprint
- keypad
- app
- key fob and key
- Reversible for left and right doors
- Guest codes from the app
- Gateway needed for remote access
Veise KS02B with Two Lever Handles
- Fingerprint deadbolt plus two levers
- 20 fingerprints and 20 codes
- ANSI/BHMA Grade 3
- Offline
- no WiFi
Yamiry YR01 Fingerprint Knob Lock
- Six unlock methods
- Code and history app management
- Reversible handle
- Gateway needed for voice and remote
Quick Overview: All 10 Picks Side by Side in 2026
The table below lists every lock in this guide with the door type it fits and the access methods that work without a network connection. All ten are indoor-appropriate hardware; none of them carries a weather rating that matters indoors beyond basic splash resistance.
| Product | Specifications | Action |
|---|---|---|
| Sifely S Fingerprint Smart Lock |
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| Veise KS02B with Two Lever Handles |
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| Yamiry YR01 Fingerprint Knob Lock |
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 KLLOQUE K10B Fingerprint Door Knob |
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 iulock IU-30 Keypad Knob |
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 NICE DIGI Z1A Keypad Lock with Handle |
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 GHome PRO Fingerprint Door Knob |
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 ThorBolt MD1 Fingerprint Door Knob |
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 GEKRONE T190 Smart Lever Lock |
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 Veise VE018 Fingerprint Knob Lock |
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Check Latest Price |
How We Tested Interior Smart Locks
Every lock here was measured against the same six criteria. Fit on a standard 1-3/8 inch interior door with a 2-1/8 inch bore, plus how long the install actually took with a screwdriver. Number of access methods that work with no network at all. Whether a privacy or passage mode exists, and whether it can be triggered from inside. Battery runtime and the fallback when the battery dies. Whether the lock needs a hub, a gateway, or a cloud account for the features people actually want. Sound level, because bedroom doors sit next to sleeping people.
We also read the customer reviews rather than the marketing pages, because for interior doors the complaints are almost always about fit and strike plate sizing rather than security. Anything that requires a subscription or a cloud login to unlock a door is flagged below.
1. Sifely S Fingerprint Smart Lock – Best Overall for Single-Bore Interior Doors
- Five working access methods including physical key
- Reversible handle fits left and right handing
- Easy guest code and schedule generation
- Adjustable auto-lock and one-touch lock
- Customer care replaces faulty units quickly
- Touchscreen keypad can be slow to wake
- No lockout after repeated failed attempts
- Not rekeyable so multiple keys are needed
- Gateway sold separately for remote access
This is the lock we ended up recommending to most people. It has the widest set of ways in that actually work without a network: fingerprint, keypad, app over Bluetooth, key fob, and a real mechanical key. That last one matters more on an interior door than people expect, because nobody wants to be locked out of their own bedroom because a battery died.
Installation was close to the advertised DIY claim. The reversible handle meant we did not have to think about handing at all, which removed the single most common install mistake we see on interior doors.
What stood out in the reviews is the speed of the support line. Owners report the Sifely team replacing fingerprint readers and handles rather than arguing with them. That is worth something on a product with this many installed units.
The honest weakness is the touchscreen. It sometimes takes a couple of taps to wake, and there is no lockout after repeated wrong codes, so a curious child can try codes indefinitely until the battery dies. Treat the PIN as a convenience, not a security control.
Best fit for a bedroom, office or garage-to-house door
Choose this one when you want temporary codes for a sitter, a contractor, or a guest, and you do not want to hand over a physical key. The app makes one-time codes easy to create and just as easy to revoke.
It also suits households where someone already runs a smart home and wants the lock in an automation, provided you are willing to add the gateway for remote unlock.
Where it falls short
Remote access and voice control are not built in. Bluetooth alone reaches the door, not the internet, so anything that happens while you are away needs the separately sold gateway.
The lock is also not rekeyable, so if you lose one of the two included keys you are carrying the other one permanently.
2. Veise KS02B – Most Versatile With Two Lever Handles Included
- 0.3 second fingerprint reads
- Includes two lever handles for a full lever set
- Vacation silent and passage modes
- One-screwdriver install in 10 to 30 minutes
- Fast knowledgeable phone support
- No WiFi and therefore no remote access
- Four AA batteries are not included
- Reader struggles with wet or sweaty hands
- Bolt can need several attempts on unreinforced frames
Most fingerprint deadbolts are just a deadbolt. This one ships with two zinc alloy lever handles in the box, which means a single purchase can cover both a lever door and a deadbolt door in a house with mixed hardware.
It is also the only lock in this group with a documented ANSI/BHMA Grade 3 certification, and that is the correct grade for an interior door. Paying for Grade 1 hardware on a bedroom door is money you get back nowhere.
Capacity is generous for a household: 20 fingerprints, 20 passcodes, and two physical keys, with anti-peeping random digits layered into the keypad.
The four AA cells are rated at up to a year, and a low battery alert triggers below 15 percent. Batteries are not included, which is true of almost every lock here.
Best fit for mixed-handle homes and code sharing
This suits a household where several people move between a home office and a bedroom and want a different code each. The fingerprint capacity of 20 covers a large family plus a caregiver without sharing PINs.
Because it is fully offline, it keeps working when the internet does not. For an interior door that is a genuine advantage over anything that depends on a gateway.
Where it falls short
No WiFi means no remote unlock and no app. If you want the lock to open when you arrive from work, this is not the one.
On an unreinforced door frame the bolt can take several attempts to throw, and the fingerprint reader is noticeably less reliable with wet hands.
3. Yamiry YR01 – Best for Rental Managers and Shared Rooms
Smart Door Handle Lock with Keypad, Yamiry Fingerprint Knob for Front Door
- Six unlock methods including fob and app
- Reversible handle for either handing
- App manages permanent and temporary codes
- Unlock history in the app
- Suitable indoors and out
- Alexa and remote control need a separate gateway
- Gateway adds cost to a multi-unit setup
If you manage more than one door, the app side is the reason to pick this. Codes can be generated as permanent or one-time, and the unlock history shows who opened which door and when. For a guest room or a small rental that is the whole job.
Six ways in sounds like a lot, and it is. Fingerprint, app, passcode, key fob, mechanical key, and voice through the gateway. Reversible handles mean one SKU covers left and right doors.
Installation on a standard wooden interior door takes about ten minutes per the manufacturer, and we found the same. The adjustable latch covers the common backset range without extra drilling.
The body is smaller than most competitors in this group, which helps on doors with narrow stiles where a chunky interior assembly fouls the frame.
Best fit for guest rooms and small landlords
Short-term rental hosts and anyone running a guest suite should look here first. Turning over access between guests is a code edit, not a key swap.
For a household that just wants codes and history, the Bluetooth-only version is enough. The gateway only matters if you want to unlock from outside the home.
Where it falls short
Voice unlock and remote control both require the separately sold WiFi gateway. On a three-door property that adds up quickly.
It is a deadbolt format, so it needs a two-bore layout or a deadbolt-ready single-bore door rather than a plain knob hole.
4. KLLOQUE K10B – Best Low-Profile Knob for Closet and Hallway Doors
Fingerprint Door Lock, Smart Fingerprint Door Knob with Lock, Silver
- Looks close to a traditional door knob
- Four modes on the thumb turn
- Rechargeable battery with about a year of life
- Physical key backup
- Easy first-time install
- Fingerprint misses on dirty or damp fingers
- App works only within Bluetooth range
- Thumb turn direction is fiddly to set
- Will not fit doors with weather strips fitted
This is the one to buy when the door is visible and you do not want a black slab of electronics on it. The round silver knob reads as ordinary hardware from across a room, which is not something the bigger fingerprint locks manage.
The thumb turn is the interesting part. It cycles through passage, normal with a seven second auto-lock, privacy, and silent modes, so a bedroom door can be set to privacy from inside without touching the app.
Battery is a rechargeable cell charged over USB Type-C. One owner measured roughly 92 percent remaining after two months of daily use, which tracks with the stated one year figure on light duty.
Because the app is Bluetooth only, the lock still unlocks with a fingerprint or a mechanical key when your phone is not in range or the network is down.
Best fit for bedrooms visible from a hallway
Privacy mode from the inside is the feature that decides this one for a kids’ room or a bedroom. Nobody has to use a code to leave the room, and nobody can barge in from outside without being logged.
The near-traditional finish also works for closets, pantries, and a garage-to-house door where a modern keypad would look out of place.
Where it falls short
It is not suitable for doors with weather strips installed, which rules out some exterior-facing garage-to-house doors.
Fingerprint reads fail more often than average when fingers are dirty or slightly wet, which in a kitchen or garage is a common situation.
5. iulock IU-30 – Best Value Keypad Knob With the Longest Battery Life
iulock Keypad & Key Smart Door Lock, 50 User Codes, Waterproof, Auto Lock – Matte Black
- Up to 50 codes of 1-15 digits
- Delayed re-lock up to 12 hours
- Backlit keypad readable at night
- Detachable silicone grip
- Longest stated battery life in this group
- No printed installation instructions
- Internal connector cable is stiff to thread
- Floppy rubber gaskets are hard to seat
- Requires the tiny printed master code to program
Four AAA cells rated at up to eighteen months makes this the least hands-on lock in the guide, and that is a real advantage on a closet, a storage room, or a door nobody thinks about until the batteries die.
There is no app, no Bluetooth, and no hub. You type a code and the door opens. For a family that wants codes without any smart home infrastructure at all, that simplicity is the feature.
The adjustable latch covers doors from 1-3/8 inch to 2-1/2 inch thick with both the 2-3/8 inch and 2-3/4 inch backset, so fit is rarely the problem.
Programming is easier than on app-based locks because there is nothing to learn beyond entering the master code. The master code is printed in very small type on the box, so photograph it before you throw the packaging away.
Best fit for sheds, closets and doors without power nearby
Pick this when the door is somewhere you do not want to maintain often, like a basement storage room or a garden shed. The eighteen month figure removes it from the mental checklist.
The delayed re-lock of up to twelve hours works well when you are carrying boxes in and out, since it does not re-latch while your hands are full.
Where it falls short
There is no activity log and no way to see who came in, so it suits access control rather than accountability. If you need an audit trail, this is the wrong lock.
Installation is the weakest part. No printed instructions ship in the box, the internal cable is stiff, and the rubber gaskets are awkward to seat evenly.
6. NICE DIGI Z1A – Best for Keyless Entry With No Hub or Phone
Keypad Door Lock with Handle, Smart Keyless Entry with Code for Front Door
- No app
- WiFi or Bluetooth to set up
- 20 personalized codes plus one-time codes
- Auto-lock adjustable from 5 to 99 seconds
- Reversible handle for both handings
- About 15 minute install
- 4 AA batteries are not included
- No remote or app-based access management
This is the cleanest answer for a household that wants a smart lock for interior doors but does not want a smartphone app anywhere near it. Nothing to pair, nothing to update, no account to create.
You get up to twenty personalized four to eight digit codes plus temporary one-time codes, and two duplicable physical keys as backup. Auto-lock timing is adjustable from 5 to 99 seconds with a passage mode for when the door stays open.
It is claimed to fit 99 percent of standard US and Canadian wooden doors, which matches what we saw on the usual hollow-core and solid interior slabs. Installation is screwdriver-only in about 15 minutes.
Aluminum alloy construction and IP54 splash resistance are more than an indoor door needs, which is a good sign about the rest of the build.
Best fit for people who do not run a smart home
Anyone who wants per-person codes for a home office or a teen’s bedroom but has no interest in voice assistants gets the most reliable experience here, because there is no wireless stack to fail.
It also works as a fallback door in a house where the main locks are app-driven, since it keeps working no matter what.
Where it falls short
No remote access and no unlock history. If you want to know when your child got up, this lock will not tell you.
The stated 8 to 12 month battery life is shorter than the iulock’s figure, and the batteries are not included.
7. GHome PRO – Best for Keeping Fingerprint Data Off the Cloud
GHome Smart Fingerprint Door Lock, 4 in 1 Smart Fingerprint Door Knob with Keypad, App Control, Auto Lock, Biometric Door Knob with Lock for Bedroom, Apartment, Garage, Home & Office
- Fingerprint data stored locally with no cloud storage
- Four unlock methods including a mechanical key
- 400mAh battery rated at 10000 unlocks or 300+ days
- Auto-lock after 5 seconds with silent and passage modes
- Around 20 minute screwdriver install
- Bluetooth only so no remote unlocking
- Each knob is programmed with its own fingerprints
- Passage mode switch sometimes needs several turns
- App user invites need an email address
The reason to choose this one is the fingerprint storage. Owners are told the templates are stored locally and never uploaded, which matters more than it sounds on a door attached to a child’s bedroom.
Capacity is 20 fingerprints and 20 passwords, and it runs on a 400mAh rechargeable cell rated at 10,000 unlocks or more than 300 days. That means no routine battery swaps on a door you rarely check.
Auto-lock fires five seconds after an unlock, with silent and passage modes available. Owners report installing several units across bedrooms and a shared room, and citing the quiet profile as a plus at night.
Fit covers doors from 1-3/8 inch to 2-1/4 inch thick, which is wider than most competitors in this group and covers thicker interior slabs.
Best fit for privacy-conscious households
Families who want biometric entry but refuse to hand a fingerprint template to a vendor server should start here. It is also usable entirely offline, since fingerprint and keypad access do not touch the network.
For a kid’s room where a physical key should not be reachable, fingerprint plus keypad removes the lost key problem without a cloud dependency.
Where it falls short
The app is Bluetooth only, so unlocking from work is not possible without adding infrastructure the manufacturer does not list as part of this product.
Each knob has to be enrolled separately, which turns a two-door job into two enrollment sessions, and the passage mode switch sometimes needs several turns to register.
8. ThorBolt MD1 – Best for Quiet Bedrooms and Nurseries
- 100 fingerprints and 100 passcodes capacity
- Quiet operation compared with most electronic knobs
- Interior handle reduces the chance of locking someone in
- 10 to 20 minute install with strike and templates
- Fast and consistent fingerprint reads
- No way to lock from the inside
- Included strike plate and box are often too large
- Batteries are not included
- Reader is weak with wet hands
Sound is the differentiator here. Owners consistently describe this as quieter than the electronic knobs they replaced, which makes it the pick for a nursery, a bedroom you walk past at night, or a hallway door near a sleeping child.
The credential capacity is the highest in the guide: 100 fingerprints and 100 passcodes under a single admin code. For a home with a nanny, a caregiver, and several children that removes the argument about sharing PINs.
Fingerprint reads have stayed consistent for owners using it daily for over a year, and the self-learning sensor improves with use rather than degrading.
Anti-peeping mode scrambles the passcode with random digits when someone types a one next to it, which matters on a door with a keypad facing a hallway.
Best fit for bedrooms, dorm rooms and home offices
This is the lock we would put on a kid’s room door. It is quiet, it holds a large number of small users’ prints, and the interior handle design makes it hard for a child to lock themselves in.
It suits a home office or study too, where you want to know who went in but are not worried about anybody forcing the door.
Where it falls short
There is no way to lock from the inside. On a bedroom door where someone might need to secure the room from within, that is a genuine functional gap.
The supplied strike plate and strike box are frequently too large for standard interior doors, so expect to reuse your existing strike rather than the one in the box.
9. GEKRONE T190 – Best Lever Handle for Narrow Single-Bore Doors
- Only lever-handle option in this roundup
- Five unlock methods including IC card
- 100 fingerprints with fast reads
- TUYA app with logs and temporary passwords
- 15 minute install with adjustable latch
- Batteries not included and carbon cells will not work
- Gateway needed for remote control
- Manufacturer advises keeping it out of prolonged sun or moisture
- Smallest review base in the group
If your interior door has a lever rather than a knob, this is the only lever in the group. The latch adjusts from the 60mm backset to the 70mm backset, so it covers both common interior layouts without hunting for a different spindle.
Five methods are available: the TUYA app, fingerprint, password, IC card, and mechanical key. The app handles unlock records, volume, temporary passwords, and user permissions.
Door thickness range is 1-3/8 inch to 2-1/8 inch, and the handle is reversible for either handing. Installation is reported at around 15 minutes.
There is a normally open function as well as automatic locking, which lets you keep the door free-running during the day and secure it at night.
Best fit for lever-handle interior and secondary doors
This suits home offices, utility rooms, and interior doors that were fitted with a lever for accessibility reasons and should stay that way. Replacing a lever with a knob to fit a smart lock is a downgrade.
It also works for anyone already running TUYA-based devices, since the app is shared with that ecosystem.
Where it falls short
Remote control needs a separately sold gateway, and the four AAA batteries are not included. Alkaline cells are required; the manufacturer specifically warns against carbon batteries.
The review base is the thinnest in this roundup at 613 ratings, so there is less long-term evidence of how it holds up than the picks above.
10. Veise VE018 – Best for Multi-Door Apartments and Offices
Veise VE018 Fingerprint Keypad Smart Door Knob Handle Lock, Matte Black
- Eight access methods with 0.2 second fingerprint reads
- 100+ passcodes with schedules and expiry
- Grade 3 and BHMA certification with 128-bit AES
- App controls permissions and auto-lock timing
- Support resolves failures with replacements
- Fingerprint reader is deliberately strict and finicky
- Gateway needed for Alexa and Google
- Each WiFi hub supports only three devices
- Battery drains faster than some buyers expect
Where most locks give you one fingerprint reader and a keypad, this one gives you a full access system: scheduled codes, duration-limited codes, remote authorization, shared passwords, and named fingerprint entries you can revoke individually.
It carries ANSI Grade 3 and BHMA certification with 128-bit AES encryption and local data storage, and it runs from -35F to 160F. For interior doors that is more headroom than needed.
Battery life is rated at up to sixteen months on four AA cells, with a Type-C emergency port and two backup keys in the box.
Several owners describe getting a replacement from Veise support after a unit failed, which is a better record than most brands in this price bracket.
Best fit for apartments, offices and small hotels
A small office or a multi-unit building gets the most out of the code scheduling and the language broadcasts, which can voice prompts in three languages for different tenants.
Because codes can expire on their own, turnover does not depend on somebody remembering to change a code at 11pm.
Where it falls short
The fingerprint reader is intentionally strict and will reject borderline fingers more often than the locks ranked above it.
Each WiFi hub supports only three devices, so a larger deployment means several gateways, and battery drain disappoints some owners using auto-lock on a high-traffic door.
Interior Door Hardware: Which Lock Does Your Door Actually Take?
This is where most interior smart lock purchases go wrong, and no amount of product quality fixes a hardware mismatch. A single-bore door has one hole drilled through the door leaf, and that hole is normally 2-1/8 inch in diameter with a spring latch behind it. A two-bore door has a second, smaller hole lower down for a thumb turn, and that is the layout a deadbolt needs.
That distinction decides everything. Fingerprint and keypad knobs and levers replace the knob on a single-bore door. Deadbolt-style locks such as the Veise KS02B, the Yamiry YR01, and the Veise VE018 need either a two-bore layout or a deadbolt-prepped single-bore door. If your bedroom door has no thumb turn hole below the main bore, a deadbolt body will not sit flush.
Backset is the distance from the door edge to the center of the bore, usually 2-3/8 inch or 2-3/4 inch on interior doors. Locks with an adjustable latch cover both. Door thickness matters too: hollow-core interior slabs are commonly 1-3/8 inch, while solid wood and thick retrofits run to 1-3/4 inch and beyond. Every lock in this guide states its thickness range, and the GHome PRO has the widest at up to 2-1/4 inch.
Then there is the case nobody warns you about. Many interior doors have a one-piece handle and lock cast as a single metal unit with no standard bore, and no smart lock will fit without replacing the whole set. Pull the interior trim plate and look before you buy.
On security grades, ANSI/BHMA Grade 3 is the correct specification for an interior door. Grade 1 and Grade 2 exist for exterior doors facing weather and forced entry. An interior spring latch gives you access control, not burglary resistance, and buying Grade 1 hardware for a bedroom is the most common way people overspend on this category.
Connectivity, Hubs and Local Control
None of the ten locks here supports Matter, Z-Wave, or Zigbee. That is a real limitation and worth saying plainly, because the home automation crowd filters on it hard. In r/homeassistant threads about interior doors, owners repeatedly reject cloud-only brands and ask for locks that lean as local as possible.
What the group actually splits into is three tiers. Four locks are fully offline: the Veise KS02B, the iulock IU-30, and the NICE DIGI Z1A work with no network whatsoever, and the ThorBolt MD1 stores credentials locally without an app dependency. Fingerprint and keypad entry on these keeps working when the internet is down.
Four are Bluetooth with an optional paid gateway for remote access: the Sifely S, the Yamiry YR01, the GEKRONE T190, and the Veise VE018, which needs the Veise G1 hub specifically. Two are Bluetooth-only for app control with no gateway path offered: the KLLOQUE K10B and the GHome PRO, where the fingerprint data stays local and the app reaches only as far as Bluetooth.
One practical note on the gateways: the Veise G1 supports only three devices each, so a four-door apartment needs two of them. Plan that before ordering, not after the first lock is already on the door.
Privacy Mode, Quiet Operation and Battery Life
For a bedroom or a kid’s room, privacy mode is the feature that matters most, and only some of these locks have a real one. The KLLOQUE K10B puts it on the interior thumb turn alongside passage, normal, and silent modes, so it can be set from inside the room without an app. The ThorBolt MD1 and the GHome PRO both offer passage and silent modes, and the GHome PRO auto-locks five seconds after an unlock.
The Veise KS02B and the iulock IU-30 offer passage and silent modes too, and the iulock adds a delayed re-lock of up to twelve hours, which is useful when your hands are full. The Sifely S leans on adjustable auto-lock and one-touch lock rather than a dedicated privacy control.
On sound, the ThorBolt MD1 is the pick that owners single out as quieter than the electronic knobs they replaced. Others note a faint hiss as the knob engages even in silent mode, which is worth knowing if the door is next to a crib.
Battery runtimes in this group run from 10 to 12 months on the GEKRONE T190 up to 18 months on the iulock IU-30, with the Veise VE018 rated at 16 months and the rechargeable GHome PRO and KLLOQUE K10B rated at 300-plus days. Nine of the ten include a USB or Type-C emergency power port, which is the cheapest lockout insurance there is. Batteries are not included on any of them, so keep a spare pack before you start.
Buying Guide: How to Choose a Smart Lock for an Interior Door
Work through these in order. First, identify your door. Single-bore with a plain knob means a knob or lever lock such as the Sifely S, KLLOQUE K10B, GHome PRO, or ThorBolt MD1. Two-bore or deadbolt-prepped means one of the deadbolt bodies. A one-piece combined handle means you are replacing the entire handle set, not just the lock.
Second, decide whether you need anything to happen remotely. If nobody needs the door to open while you are away, buy offline and enjoy the reliability. If a caregiver, cleaner, or rental guest needs entry while you are out, you need app control, and that means either accepting Bluetooth range limits or budgeting for a gateway.
Third, check the privacy control. If the lock is on a bedroom, a kid’s room, or a bathroom, a thumb turn privacy mode is close to mandatory. If it is on a closet or a storage room, it is unnecessary.
Fourth, confirm the battery format matches your habits. Rechargeable locks need a USB Type-C cable near the door every eight months or so. AA or AAA locks need batteries in reserve, and all ten of these exclude cells from the box.
Fifth, if you are a renter, check the lease and check the strike plate. Interior doors in rentals are often cheap hollow-core units with oversized strikes, and you may need your landlord’s permission before modifying a door. If you are a landlord, prioritize a lock that keeps a working mechanical key and lets you change codes without replacing hardware. Our main smart lock guide covers the rental and landlord angle in more depth.
Sixth, and last, measure before you order. Bore diameter, backset, door thickness, handing, and the swing clearance of the lever all need to be right. Photograph both sides of the door and the strike area before removing anything, so you know exactly what to put back if the lock does not fit.
Frequently Asked Questions
What lock is best for an internal door?
For a single-bore interior door with a plain knob, a fingerprint knob lock is the best fit. The Sifely S is the strongest all-round option because it offers fingerprint, keypad, app, key fob, and a physical key, with a reversible handle that fits left and right handing. If your door has a deadbolt, choose a fingerprint deadbolt such as the Veise KS02B, which is ANSI/BHMA Grade 3 rated and fully offline.
Can I put a smart lock on an interior bedroom door?
Yes, and bedrooms are where interior smart locks make the most sense. Look for a privacy or passage mode that can be triggered from inside the thumb turn, so a child can leave the room without a code but cannot be barged into. The KLLOQUE K10B, ThorBolt MD1, and GHome PRO all provide a privacy control, and quiet operation matters for a door next to a nursery.
Do I need a hub for a smart lock?
It depends entirely on whether you need remote access. Four of the ten locks here work with no network at all, using fingerprint, keypad, or key entry offline. Four use Bluetooth with an optional separately sold gateway for remote unlock and voice control. Two are Bluetooth-only with no remote path offered. The Veise G1 gateway supports only three devices each, so larger installations need more than one.
How do I measure a door for a smart lock?
Check four things. Bore diameter is usually 2-1/8 inch and must match the lock body. Backset, the distance from the door edge to the bore center, is typically 2-3/8 inch or 2-3/4 inch, so look for an adjustable latch. Door thickness runs from 1-3/8 inch on hollow-core slabs up to 1-3/4 inch or more on solid wood. Finally, count the bores: one hole means a knob or lever lock, two holes means a deadbolt.
Are smart locks worth it for interior doors?
They are worth it for access control rather than security. An interior spring latch gives you per-person codes, revocable guest access, and a record of who entered, not burglary resistance, and ANSI/BHMA Grade 2 or Grade 3 is the correct specification. Skip Grade 1 hardware here. If nobody needs remote access while you are away, an offline keypad or fingerprint lock is more reliable and needs no hub.
Conclusion: The Interior Smart Lock Shortlist
The Sifely S is the smart lock for interior doors we would buy first, because it fits the common single-bore door, offers five working ways in including a mechanical key, and keeps working without a network. Buy the Veise KS02B if you want a documented Grade 3 rating and two lever handles in the box, and buy the ThorBolt MD1 if quiet operation on a bedroom door is the priority.
Whatever you choose, measure the bore before you order, keep spare batteries on hand, and remember that none of these ten supports Matter. If you want the full front-door picture rather than the inside of the house, start with our best smart locks roundup, updated for 2026.