The real reason budgeting apps don't stick — it's not motivation, it's data entry

I've tried every budgeting app. They all fail at the same point: manual input.

You buy something. You mean to log it. You don't. By the end of the month, you have 40% of your actual spending in the app, and the rest is a mystery.

The only thing that worked for me: eliminating the logging step entirely. Scan the receipt right after checkout. A few seconds. Everything is captured — items, prices, quantities, size, unit, etc. — without typing anything.

@CartLens does this and then goes further — it cross-references what you paid against a live crowdsourced price index and tells you where you overpaid. But the foundation is just: remove the friction from the data capture.

What habit-formation strategies have worked for you in consumer finance apps? Curious whether others have found friction reduction more effective than gamification or reminders.