
Traditional apps stop at “R 150 at the supermarket.”
Billaby reads the slip — milk, sugar, peanut butter — and tells you what actually moved.
One-tap camera, long-slip stitch, email forward. JPEG under 400KB. The slip is the input.
Raw OCR becomes a canonical SKU with unit price — sugar per kilo, milk per litre.
Ask "Has sugar gone up?" and get a curve, not a lecture. Lifestyle-preserving swaps only.