I wrote this post after a bit of a failed startup I tried making at the start of lockdown. It was called Ottr and it essentially aped YikYak exactly. I made a react web app, an API with web sockets (it had real time posting and comments) and even an iOS app.
I burnt out on it and gave up because it seems so hard to get that initial traction.
I've been trying to get the project posted publicly on GitHub for a while now but I wrote maybe 10k+ lines with literally zero tests because I was just trying to get it to market. The code isn't bad but i'd feel bad posting it without tests so that's what i'm working through now.