The Ardwolf A1 smartlock can be opened in three different ways: with a key, with a PIN code or with your fingerprint. That gives it a simplicity of ease that most PIN code locks don't have, but if you're worried that somebody might find a way to bypass one of those systems it offers two other methods: requiring both the PIN code and the fingerprint or requiring a combination of two different fingerprints, presumably from the same pair of hands. The A1 can be programmed with up to 100 different PIN codes and 100 different fingerprints, so it would be a good choice if you're managing an apartment building and have quite a few different users who need to get in. (If you really need a huge number of PIN codes, the Yale Real Living YRD240 can handle up to 250.) The lock is programmable from its 12-digit keypad, with a * key and a # key for programming purposes.
If you simply want to leave the premises open for visitors, you can disable the PIN code system entirely, reactivating it later. Ardwolf refers to this as "passage mode." It can be enabled simply by opening the door and immediately pressing #. (You have a five-second window to do this.) Simply entering a new code or fingerprint turns passage mode off and reverts to the normal lock mode. Ardwolf advertises the simplicity with which the door can be installed, using only an Allen wrench. The handle direction is adjustable, depending on which way the door opens. It fits doors with thicknesses between 1-3/8" and 2-3/8" and if you have a 2-1/8" deadbolt hole, there's no need for additional drilling. The lock has an attractive satin nickel finish, so it won't be jealous of other locks on the street.
You might prefer a lock with remote control. The Schlage Sense BE479 will work with Apple's Homekit, built into the Apple TV, while the Schlage Connect FBE469NX works with Z-Wave controllers. For the ultimate in simplicity, the Kwikset Kevo and the August ASL-02 unlock when they merely detect a smartphone in your pocket.
Installation was really easy. Programming took a little patience, but the whole process took less than 30 minutes. All in all, I absolutely love this lock!
Returned. Software kept locking up on first day. Reset multiple times while trying to setup user codes. Went with a different brand- works awesome.