I built BuzEntry to fix that. It automatically answers your building’s buzzer and presses the unlock key. No app, no hardware, just a phone number that works in place of yours. You can also set an optional passcode that guests or delivery drivers have to say or type before the door unlocks.
I’d love feedback on the best ways to reach people who’d actually find this useful, other features that could add real value, and any buzzer quirks or edge cases worth testing.