Media for Automated front door lock?

Automated front door lock?

Newbie here-

I need to replace my front door lock/deadbolt combo, and was thinking it would be nice to put in something with a keypad where I could program several codes with different expirations (for repairmen, meter readers, etc.)

Before I just go buy whatever is at the store, I thought I'd check and see if anyone knows of a model with one additional function- it would be great if one had a proximity sensor (RFID key fob or something) where the door would automatically unlock if I got within, say, 3-5 feet of it. That way I could be carrying an armload of groceries and not have to fumble for my keys.

Where should I be looking for this, if such an animal even exists?

Thanks, Keith