There are a variety of products available that will automatically open doors on the market for commercial and private home use. The following link is a variety of supports to get started with considering this as an option.
Keypad locks provide keyless entry and locking for doors inside and outside the home. For easier installation check to see if the current brand of lock on your home also sells keypad locks that are compatible with your current lock.
There are a variety of different keyless entry devices available using smartphones or bluetooth features to unlock doors. Depending on the accessibility needs of the person the following products meet a wide variety of support needs.
Lockitron – Fits over the existing deadbolt and works with iPhone 4s and 5 to automatically unlock the door when it senses you walk up.
Kevo Lock – This lock requires some installation. Compatible with the iPhone 4s and 5 or a bluetooth fob the user is sensed by the lock and taps the lock for entry.
Goji Smart Lock – This lock requires some installation. The Goji lock fits on the outside of your door and sends a picture to your smartphone of who is at your door. Works with smartphone entry and also bluetooth fobs.