Is there an import/export backup feature of the data? One of the biggest hold backs for me when installing an app that'll take me some time to set up is the fear I might have to restart if it gets abandoned.
Also, $8 one time payment is totally fine in my opinion. It's a one time payment and probably a useful app.
Idk if you're joking or not but I'm pretty sure some person posted a fediverse version of a dating app yesterday somewhere lol.
I wouldn't hold my breath for that one to take off though.