Private unit price ledger
Scan a price, confirm the package amount, and keep a private unit-price ledger with portable PDF and CSV exports.
Scan a price
Position a shelf tag or receipt so the price and package size are clear.
Review & Confirm
Choose the source. You will review every recognized value before it is saved.
Compare Proof
Confirm two packages from the same quantity family to compare their unit prices.
Price Ledger
Scan or enter a shelf price to build your private price history.
Deterministic calculation
Unit price equals total price divided by the confirmed net quantity. Mass is normalized per 100 g, volume per 100 mL, and counts per item.
OCR and calculations run on this device
Scan a shelf tag or receipt, review the recognized price and package amount, and save a private unit-price record on your iPhone or iPad. CartProof AI normalizes mass per 100 g, volume per 100 mL, and counts per item so you can compare packages without mental arithmetic. Every recognized value stays editable until you confirm it. Build a local price ledger, compare two confirmed packages, and export your records as PDF or CSV. Recognition and calculations run on your device. Selected images are not retained after you confirm or cancel. No account, ads, analytics, tracking, cloud AI, online price feed, coupons, subscriptions, or in-app purchases. CartProof AI is a paid download and does not provide financial advice or make claims about retailer intent.