Best Smart Lock for a Door with a Dog Flap for Secure, Pet-Friendly Entry

A door with a dog flap is a security problem before it is a convenience: the flap is a hole, and the lock has to be good enough to compensate. This guide covers five picks — two automatic pet doors that replace the flap entirely, one app-controlled pet door, and two smart deadbolts for the human side of the same door. Budget-conscious renters, large-dog households and app-first buyers each get a clear winner. The overview below is the fastest route to a decision.

Overview of the Picks

Product	Key Spec	Best Use	Price Tier
PetSafe Electronic Pet Door, Large	Collar key sensor, up to 5 keys	Budget selective-entry flap replacement	Mid
Power Pet Smart Automatic Pet Door, Large	Deadbolt locking, collar activation	Large dogs needing a real lock	Premium
PetSafe SmartDoor Connected, Medium	App control, custom schedules	App-first multi-pet homes	Upper mid
myQ Secure View 3-in-1 Smart Lock	2K HDR camera, face and fingerprint	Front door with camera coverage	Mid
eufy Security Smart Lock C220	Fingerprint, Wi-Fi, IP53	Best value human-side deadbolt	Budget

1. PetSafe Electronic Pet Door, Large — Best Budget Selective-Entry Pick

Type: Electronic pet door with collar key sensor
Selective Entry/Exit: Programmable
Auto-Lock: Yes
Keys Supported: Up to 5
Power Source: Battery operated
Door Compatibility: Interior and exterior doors
Pet Size: Dogs up to 100 lb

This is the straightforward answer for a household that wants the flap to stop being an open hole. The collar key sensor unlocks the panel only for a tagged pet, so a passing animal — or a person reaching through — meets a locked door. Auto-lock closes it again without anyone thinking about it, and the battery operation means no wiring run to an exterior door. It fits both interior and exterior doors, which makes it flexible for a mudroom or a back door.

The five-key limit is the constraint to plan around. A home with more than five tagged pets, or one that wants a spare collar for a sitter, runs out of slots quickly. Battery operation also means a maintenance rhythm the household has to own.

Trade-off: Battery power and a five-key ceiling keep the price down, but a large multi-pet home will outgrow the slot count.

Check the current price on Amazon

2. Power Pet Smart Automatic Pet Door, Large — Best Heavy-Duty Pick for Big Dogs

Type: Automatic pet door, door mount
Locking: Deadbolt
Activation: Smart Detect collar
Connectivity: Non-WiFi
Size: Large
Pet Size: Large dogs

The deadbolt is the headline here. Where most pet doors rely on a latch, this one locks with a deadbolt, which is the mechanism that actually deters someone pushing at the panel. Smart Detect collar activation opens it for the tagged pet and nothing else. The large size suits big dogs that a medium flap would pinch, and the door-mount design keeps the install contained to one door.

The non-WiFi build is a deliberate trade: no app, no scheduling, no remote lock, but also no network dependency and nothing to reconnect. That suits a household that wants the door to simply work. The premium price is the other consideration — this is the most expensive pick in the guide by a wide margin.

Trade-off: The deadbolt and large opening justify the price, but buyers who want app control or scheduling will find none here.

Check the current price on Amazon

3. PetSafe SmartDoor Connected, Medium — Best App-Controlled Pick

Type: App-controlled pet door
Selective Entry/Exit: Yes
Scheduling: Custom schedules
Remote Lock: Via My PetSafe app
Notifications: Phone alerts
Multi-Pet: Supported
Size: Medium

This is the pick for a household that wants the flap to behave like a smart device. Custom schedules mean the door can be open during the day and locked at night without anyone touching it. Remote lock and phone notifications through the My PetSafe app cover the case where the household is out and wants to confirm the door is shut. Multi-pet support handles a house with more than one tagged animal.

The medium size is the limit to check first. It suits small and medium dogs and will not accommodate a large breed — a household with a big dog should look at the first two picks instead. App control also adds a setup step and a network dependency that a plain electronic door avoids.

Trade-off: Scheduling and remote lock are genuinely useful, but the medium opening rules out large dogs and the app adds a setup layer.

Check the current price on Amazon

4. myQ Secure View 3-in-1 Smart Lock — Best for Front Door Coverage

Type: 3-in-1 smart lock with video doorbell
Camera: 2K HDR
Access Methods: Face, fingerprint, PIN, app
Night Vision: Color
Audio: Two-way
Power: Not stated in name

This is the human-side answer for a door that also has a dog flap. The built-in 2K HDR camera and color night vision cover the approach, which matters when the flap is the weak point — anyone crouching at the door is on camera. Face and fingerprint access mean no key to fumble, and PIN and app control cover guests and deliveries. Two-way audio handles the doorstep conversation remotely.

The camera and lock in one unit is a real space saver, but it also means one failure takes out both functions. Buyers who already have a doorbell camera are paying twice for the same job.

Trade-off: Bundling the camera into the lock saves hardware, but a single fault disables both entry and surveillance at once.

Check the current price on Amazon

5. eufy Security Smart Lock C220 — Best Value Deadbolt

Type: Smart deadbolt
Connectivity: Built-in Wi-Fi
Access: Fingerprint, keyless
Battery Life: Up to 8 months
Weather Rating: IP53 waterproof
Certification: BHMA Grade 3
Control: App remote

The value pick, and the most popular in this guide by purchase volume. Built-in Wi-Fi means no separate hub, and the fingerprint reader handles keyless entry in one touch. Up to eight months of battery life keeps maintenance rare, and IP53 waterproofing plus BHMA Grade 3 make it a reasonable fit for an exterior door that sees weather. App remote control covers locking from elsewhere in the house or away.

The trade-off is scope: this is a deadbolt only, with no camera and no pet-door integration. A household that wants the flap itself to be smart needs one of the pet-door picks above. Grade 3 is also the entry tier of the grading scale, which suits a residential door but not a security-first install.

Trade-off: The price is the lowest here and the feature set is narrow — no camera, no pet-door control, and entry-level grading.

Check the current price on Amazon

Before You Buy

• Door thickness and cutout: A pet door replaces or occupies a cutout, so measure the door panel before choosing a size — a large unit will not fit a narrow door.
• Pet size: Match the opening to the largest animal that uses it; a medium flap on a large dog is a non-starter.
• Number of pets: Collar-key systems cap the number of tags, so count every animal plus any spare collar before buying.
• Power source: Battery units avoid wiring but need a replacement schedule; check whether the model reports low battery.
• Connectivity: Wi-Fi and app control add scheduling and remote lock but also a setup step and a network dependency.
• Locking mechanism: A deadbolt is a stronger deterrent than a latch; a pet door with a deadbolt is the security-first choice.
• Weather exposure: An exterior door needs a unit rated for moisture; IP ratings matter more here than on an interior door.

Frequently Asked Questions

1. Can a smart lock work on a door that already has a dog flap?
   Yes. The lock and the flap are separate hardware on the same door, so a smart deadbolt handles the human entry while the flap handles the pet. The two do not interfere as long as both fit the door panel.

2. Is a smart pet door as secure as a smart lock?
   A selective-entry pet door with a deadbolt comes close, because it only opens for a tagged collar. A plain flap is the weak point; replacing it with a locking electronic door closes that gap.

3. What is the best smart lock for a door with a dog flap on a budget?
   The eufy C220 is the lowest-cost way to secure the human side, and the PetSafe Electronic Pet Door is the cheaper route to a locking flap. Pairing the two covers both openings without a premium outlay.

4. Do these pet doors work with more than one dog?
   The PetSafe SmartDoor Connected explicitly supports multiple pets, and the Electronic Pet Door holds up to five keys. The Power Pet door uses collar activation but does not state a tag limit in its name.

5. Does a smart lock need Wi-Fi?
   Not always. The Power Pet door is non-WiFi by design, and a fingerprint deadbolt can work locally. Wi-Fi is what enables app control, schedules and remote locking.

6. How often does battery need replacing?
   It varies by model — the eufy C220 states up to eight months. A pet door that cycles many times a day will drain faster than a deadbolt used a few times daily.

Bottom Line

For most households, the PetSafe Electronic Pet Door is the best smart lock for a door with a dog flap: selective collar entry, auto-lock and battery operation at a mid-tier price, with the five-key limit as the only real caveat. Households with a large dog should step up to the Power Pet for its deadbolt, and anyone who wants the human side covered too should add the eufy C220 as the value deadbolt.