@_frederickjames I shared my stats back. I'm dead. But trying to work out. Let's compare notes in a month. I lost on ads(plenty so not say exact numbers), data collection is valuable but need to find a way. Otherwise, it doesn't work.
From your yearly price, I worked out your break-even CPI (cost per install) = £1.5. So your target CPI is probably less than 1.5 and around 1. You are right to try to find niche territories. We haven't calculated 15% Apple fee and may be some AI API cost if there is any. Tough game.
I take notes a lot. Good thing I take notes using tool I built. Just for personal use through not selling as I don't see there is an USP compare to other tools on the market. Just enjoying eating my own dog shits.