Who buys this
People with irregular income, freelancers and small family budgets, who abandoned a spreadsheet after three weeks because filling it in was a job in itself.
Where to start in Lovable
Paste this into Lovable as the opening prompt. It sets up one screen and one job, which is easier to grow from.
Build a personal budgeting app. The user imports a bank statement as CSV or adds expenses manually. The app categorises every transaction, shows the month as a simple picture of money in and money out, and marks the categories that grew against the previous month. Add savings goals with a target date and a monthly amount, and a screen that answers one question: how much is safe to spend until the next payday. Keep every number editable by hand, and never move money anywhere.
What you will need to wire up
- Lovable AI Gateway
- Lovable Cloud (Postgres)
- Storage для выписок
- Stripe
Build order
- Start with import, not with charts. Take three real statements from three different banks and make the parser survive all of them: different date formats, comma decimals, a debit and credit column instead of one signed amount. Everything else in the product depends on this step.
- Categorise by rules first, by model second. Most rows repeat every month, so a merchant to category table handles them for free. Send only the unknown merchants to the model, save its answer as a new rule, and the monthly cost of the app drops to almost nothing by the third month.
- Answer one question on the main screen. Safe to spend until payday is the number people open the app for. Compute it as income left minus known recurring charges minus the monthly savings target, and put it above everything else.
- Say plainly that this is not advice. Keep the investing part descriptive: show what the user already holds and how allocation shifted. The moment the app recommends buying something, you are in a regulated business in most countries.
Where this usually breaks
- Bank CSV exports change without warning and a silent parser failure looks like the user lost money. Validate row counts and totals after import and show a diff before saving.
- One misfiled transaction destroys trust in every chart. Make recategorising a single tap and remember the correction as a permanent rule.
- Financial data raises the stakes on access rules. Every table is scoped to the owner, exports are generated on the server, and raw statements are deleted after parsing unless the user asks to keep them.
How it makes money
- Subscription per household. A shared budget for two people is what makes the app hard to cancel, so price the household plan, not the seat.
- Free import, paid history. The current month stays free forever and year over year comparison is the paid feature, because value grows with the data the user already put in.
Build this on Lovable
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