Smartphone based multifamily door intercom system?

[Johann Jells]

This has been asked before with few responses, but I figured why not try again? I'm looking for a video intercom/door entry system for a 4 family that in ,addition to the obvious doorbell function, will allow them to buzz package deliveries into the common area from anywhere using their phone. Optimally it will also allow programmed entry codes for regulars like USPS and UPS. I've seen some that are mega-expensive designed for hi-rises like ButterflyMX, and some that are cheaper but sketchy like the GBF WiFi Video Doorbell Intercom on Amazon. I'd still take a chance on the latter if it had a keypad entry on the 4U version.

So, has anyone been down this road?