I spent 13 years keeping a paper service book for my own car writing down oil changes, dates, mileage by hand. When I finally decided to build something, I didn't start with an idea. I started by testing dozens of niches through ASO data: search volume, competition, how weak the current top players actually were.
Car maintenance tracking checked every box. The top 20 apps in the App Store are mostly small players with 0 300 ratings a real gap, not a hypothetical one. And AI is barely showing up in this space yet. Most competitors still make you type in every field by hand after you take a photo of a receipt, if they let you attach one at all.
So that's what I built Docaro around: snap a photo of any receipt, AI reads it and fills in the record automatically date, mileage, work done, parts, cost. Works in any language, since I wanted something that'd hold up for people who travel or live in multilingual places. Plus a one-tap PDF export, since "prove your car was maintained" is a real thing that affects resale value.
I'm building this solo, using an AI-assisted, multi-agent dev process I'm still refining as I go.
Curious what maintenance or expense-tracking apps you've personally tried and dropped and what made you give up on them?