Windfall
Photographs your receipt at the till and classifies it against HMRC rules for UK sole traders.
Windfall reads a receipt photo taken at the moment of purchase, classifies the expense against HMRC's allowable-expense rules for your profession, and shows its reasoning in plain language before you confirm. At year end it exports a categorised record ready to file, instead of you reconstructing months of spending from memory. It costs £59/year, positioned as less than the value of one missed deduction like use-of-home-as-office (£312–£1,200/yr) or business mileage (£450–£4,500/yr).

What holds up
- +£59/year — the maker frames it as cheaper than a single missed deduction like home-office use.
- +Shows the HMRC reasoning behind each classification, not just an accept/reject verdict.
- +30-day free trial with full features and no credit card required.
Mind the limits
- −Only useful for UK sole traders — the HMRC rules it's built on don't apply elsewhere.
- −Only as good as your habit of photographing receipts the moment you buy — miss that, miss the record.
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