Here is another smart door lock that lets you enter your home with your smartphone. The PIN Genie Keyless Door Lock lets you lock and unlock your door via its touchscreen or an iOS/Android device. The pin pad stores up to 8 codes for multiple visitors. The lock has an alarm system that activates a 95dB siren to deter thieves.
The PIN pad has 4 buttons with 3 numbers on them each. The numbers reshuffle after each try to make guessing your pin harder.