Simple tracking is for stalls, markets and one-person businesses — record what you sold and what you spent, see your profit, and know where the month is heading. No double-entry, no chart of accounts, nothing to learn.

Record a sale or a cost in two taps.
Photograph the receipt as you go.
See today's takings and the month's profit.
A market seller records the day's takings and costs in two taps each evening, and sees the month's profit without knowing any accounting.