Meet Saleproof — Is that sale actually a deal?

Food And Drink

Saleproof

Is that sale actually a deal?

What Saleproof does

That "SALE $3.99" tag means nothing if you don't know what the item cost last month. Saleproof is the old-school grocery price book, rebuilt for the checkout line: log a price in seconds — item, store, price, package size — and your phone quietly becomes the one source of truth flyers and shelf tags can't fool.

The heart of the app is the deal check. Standing in the aisle, pull up any item and Saleproof compares today's tag against your own logged history at that store and others nearby: a clear verdict — genuine deal, normal price dressed up in yellow, or actually more than you paid in March. Because everything is normalized to unit price, shrinkflation gets caught too; when the box shrinks from 13 oz to 11 oz at the same sticker, your per-ounce number jumps and Saleproof says so.

Over time, your log becomes something no government statistic can give you: a personal inflation view. See what your real basket costs month over month, which items are climbing fastest, and which store has genuinely drifted expensive — not vibes, your receipts.

Saleproof is completely free and 100% offline. No account, no sign-in, no internet required — every price you log is stored privately on your device with SwiftData and never leaves it.

• Ten-second price logging by item, store, and package size • Deal check: today's tag vs. your own price history, with a plain verdict • Automatic unit-price math (per oz, lb, count) across sizes and stores • Per-item price timelines with best-ever and typical price • Personal basket inflation chart, month over month • Free, offline, no account — your data stays on your phone

Download Saleproof and stop taking the shelf tag's word for it.

A look inside

Tap any screenshot to open the full-resolution version.

What's inside

• Price log — Fast at-the-shelf entry: pick or create an item, choose the store, enter price and package size/unit; recent items resurface first so weekly staples take seconds. Home shows your most-logged items with current best price and store.
• Deal check — Enter the shelf price you're looking at for any tracked item and get a verdict — Real Deal, Typical, or Worse Than Usual — computed against your logged min, median, and recent prices at that store and across stores.
• Unit-price compare — For any item, a side-by-side table of stores and package sizes normalized to price per oz/lb/count, flagging when a 'same price' refill actually got smaller (shrinkflation alert badge on the item).
• My inflation — A month-over-month chart of what your tracked basket costs, with a ranked list of fastest-rising items and a per-store drift view showing which store has gotten expensive relative to your history.

Why we built it

Shoppers can't tell real discounts from theater: stores anchor on inflated 'was' prices and shrinking package sizes, flyer apps show prices that expire or don't match the shelf, and nobody remembers what chicken thighs cost at the other store last month — so people overpay on fake sales and only feel, rather than see,…

What makes it different

Unlike Bhav, our India mandi logbook for farmers recording wholesale crop sale rates, Saleproof serves US retail grocery shoppers on the buying side — and unlike flyer/list apps (Flipp, Basket) that push expiring third-party prices, it is judgment-first: every feature funnels into an at-the-shelf verdict ('real deal o…

Who it's for

Built for anyone who values fast, private, on-device software with a calm, focused UX.

In one line: Is that sale actually a deal?

Try it

See the Is that sale actually a deal? for the full feature list, the info table, and support links.

Use Saleproof, found a bug, or have a feature request? Comments are open below — anonymous is fine.