I recently visited a friend in Finland. In Finland it's common for apartments to not have doorbells downstairs. Instead the door has a pincode that people use to get in which are typically shared with friends when you invite them.
Except those pin codes are now commonly disabled for security reasons. So, I was waiting downstairs wondering what to do and in the end just called my friend after which he came downstairs to open the door. That works of course but a QR code would be a good alternative.
Even if it just contained a tel:// link with the phone number. I love QR codes for low tech solutions like this.
This stuff doesn't have to be hard. And you don't even need an app for this. Just print your own code with your phone number, email address, etc. (from any of a vast number of web based generators) and put it near the door with some instructions.
Except those pin codes are now commonly disabled for security reasons. So, I was waiting downstairs wondering what to do and in the end just called my friend after which he came downstairs to open the door. That works of course but a QR code would be a good alternative.
Even if it just contained a tel:// link with the phone number. I love QR codes for low tech solutions like this.
This stuff doesn't have to be hard. And you don't even need an app for this. Just print your own code with your phone number, email address, etc. (from any of a vast number of web based generators) and put it near the door with some instructions.