As many people have said this is a very crowded space littered with dead apps. One of the biggest issues is that you ultimately will want some kind of “comments” section because communication is central to planning, which at that point you end up reinventing texting but as a worse interface as comments, and then people will just resort to texting. It’s not clear why this is so much better than a) texting, and b) posting this to a social network in the first place. Covid certainly makes the timing poor, and even if you don’t have restrictions now, that’s probably not a good thing and not something to encourage.

Getting people to download a new app or a new anything at this point needs to be really a fundamentally new product experience that is 10-100x better than anything else you’re using. It’s easy to think about... if someone told you to download an app to notify when you’re going to the bar, and everyone has to download it, would you really change the social inertia from your existing communication solutions just to post a bar notification? That’s a pretty tough proposition.