You want to give your pet the freedom to come and go without worrying about stray animals slipping inside. That is where smart pet doors with selective entry come in. In this guide, we compare two leading options: the PetSafe Electronic Pet Door (collar‑key system for dogs) and the SureFlap Microchip Cat Flap (microchip‑based for cats). We also include the newer PetSafe SmartDoor Connected Pet Door for those who want app control. Whether you have a cat, a dog, or both, this article will help you pick the right door. For more side‑by‑side product analysis, visit our Pet Tech Comparisons section.
Buying Guide
Selective Entry Technology
The SureFlap microchip cat flap reads your cat’s implanted RFID microchip (or a programmable collar tag) and only opens for registered pets. It learns up to 32 identities, making it ideal for multi‑cat households. The PetSafe Electronic Pet Door uses a waterproof collar key that signals the door to unlock; it works for up to five keys. The PetSafe SmartDoor goes further by combining a collar key with microchip reading and adds Bluetooth control through the My PetSafe app. If you want true hands‑free selective entry without collar tags for your cat, the SureFlap is the clear choice. For dogs, the collar‑key system is straightforward and reliable.
Size and Pet Compatibility
The SureFlap is designed exclusively for cats, with a flap opening of 4.75 inches high by 5.625 inches wide. That is tight for a small dog, but perfect for felines. The PetSafe Electronic Pet Door comes in large size and accommodates dogs up to 100 pounds, with a larger flap that even big breeds can use. The PetSafe SmartDoor is available in medium size, suitable for cats and small‑to‑medium dogs (up to roughly 40 pounds). Check your pet’s size against the opening dimensions before buying. For larger dogs, the Electronic Pet Door is the best fit; for cats or small dogs, the SmartDoor or SureFlap works well.
Smart Features and Control
The PetSafe SmartDoor stands out with its smartphone app. You can lock and unlock the door remotely, set custom schedules for each pet, and receive notifications when your pet uses the door. The SureFlap is purely offline, no app, no schedules, but its one‑button programming is extremely simple. The standard PetSafe Electronic Pet Door also lacks app connectivity; it offers programmable selective entry and exit modes but no remote control. If you value being able to change settings from anywhere, the SmartDoor is worth the upgrade. For a set‑and‑forget solution, the SureFlap or standard PetSafe door are both reliable.
Installation and Power Source
All three models install into doors, windows, or walls, though the PetSafe doors require a separate wall‑mount kit for wall installation. The SureFlap runs on four AA alkaline batteries (non‑rechargeable, not included), with an estimated one‑year battery life and a low‑battery indicator. The PetSafe Electronic Pet Door uses four D‑cell batteries, also with a low‑battery warning. The SmartDoor runs on the same D‑cell configuration but adds a rechargeable backup battery. Battery life varies with usage, but you can expect several months between changes. For long‑term installation, be prepared to replace batteries periodically. For more guidance on installation techniques, explore our Pet Tech Guides category.
Final Thoughts
After reviewing these three smart pet doors, the right choice depends on your specific pets and lifestyle. For cat owners who want a no‑fuss, microchip‑based door that keeps strays out and requires no app or collar tags, the SureFlap – Sure Petcare Microchip Cat Flap, White is our top recommendation. For dog owners who want modern connectivity, remote control, and the ability to set schedules from your phone, the PetSafe SmartDoor Connected Pet Door offers the best balance of convenience and technology. Both are built by trusted brands and have been validated through thousands of user installations.
Frequently Asked Questions
Do these pet doors work for both cats and dogs?
SureFlap is designed for cats only. PetSafe Electronic Pet Door (large) is for dogs up to 100 pounds. PetSafe SmartDoor (medium) works for cats and small‑to‑medium dogs. Always check the flap opening size for your pet.
Can I use my cat’s existing microchip with these doors?
The SureFlap reads standard microchips (9, 10, and 15 digit formats). The PetSafe SmartDoor can also pair with your cat’s microchip if it is a compatible type (see the manufacturer chart). The standard PetSafe Electronic Pet Door does not read microchips, it uses a separate collar key.
How long do the batteries last?
SureFlap claims up to 12 months on four AA alkaline batteries. PetSafe Electronic Pet Door runs on four D‑cell batteries with similar longevity. The PetSafe SmartDoor includes a rechargeable backup that maintains settings during power loss but draws from D‑cells for the motor. Replace batteries as soon as the low‑battery indicator lights up.
Can I lock the door remotely with the PetSafe SmartDoor?
Yes. Using the My PetSafe app, you can lock or unlock the SmartDoor from anywhere. You will also receive notifications when your pet uses the door. This feature is exclusive to the SmartDoor model; the standard Electronic Pet Door and SureFlap offer no remote control.
