About this app
What Cartwise does
Cartwise is the price book frugal shoppers have kept on paper and in spreadsheets for decades — now in your pocket, fully offline. Log what you actually pay for the groceries you buy, at the stores you visit, and Cartwise instantly does the math you hate doing in the aisle: it normalizes every price to a unit price ($/oz, $/100g, or $/each) so you can compare a giant box against a small one in one glance. The next time you're shopping and unsure, tap an item and Cartwise tells you straight up: is this a good price, or are you about to overpay versus the lowest you've ever seen? No account. No subscription. No internet required — ever. Your price history lives only on your device, so a server outage can never lock you out of your own data. That's the whole point. • Quick-log a price in seconds: item, store, size, total — unit price is automatic • "Good deal?" verdict against your own lowest-seen price, right in the aisle • Compare every store you've logged, sorted cheapest-first per item • Barcode quick-scan to pull up an item's history (Pro) • Price history charts + "stock up now" alerts when an item hits its low (Pro) • Export your whole price book to CSV (Pro) Stop guessing at the shelf. Build your price book once, save on every trip. Download Cartwise and never overpay for the basics again.
Features
Built to be useful, not noisy.
Quick log
User logs a price (item, store, package size, total) in a few taps; Cartwise computes and stores the normalized unit price automatically.
Good-deal verdict
On any item, Cartwise shows the lowest unit price ever logged and tells the user whether the current/last price is a good deal or X% above their low.
Price book list
Home shows every tracked item with its current best price, best store, and unit price, searchable and sortable.
Store comparison
Per item, a table of every store the user has logged, sorted cheapest-first by unit price.
Barcode scan
Pro: scan a barcode on-device (AVFoundation, no network lookup) to instantly open that item's history or start a new entry keyed to the code.
Price history & stock-up
Pro: a chart of price over time per item, plus flags for items currently at or near their lowest so the user knows when to stockpile.
Why it exists
The problem
Shoppers can't tell whether a grocery price is genuinely good because comparing across package sizes requires unit-price math they won't do at the shelf, and they have no record of the lowest price they've previously paid.
What's different
How Cartwise stands out
A fully-offline personal price book that auto-normalizes every logged price to a unit price ($/oz, $/100g, $/ea) and gives an instant in-aisle 'good deal vs. your own lowest-seen price' verdict — with no account, no network, and no subscription, so unlike Flipp (online flyer feed), PricePad (which locked users out of…
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FAQ
Questions about Cartwise
How much does Cartwise cost?▾
Cartwise is free. All features are included from day one — no subscription, no in-app purchases, no paid tiers. Everything you see in this listing works the moment you install it.
Where does Cartwise store my data?▾
On your device. Cartwise is built privacy-first: no account is required, no analytics SDKs, no third-party trackers. Nothing is uploaded to a server we control — the app works without one.
What platforms does Cartwise support?▾
iOS, on iPhone and iPad. You can find the latest availability on this page.
How do I get support for Cartwise?▾
Use the Support link on this page, or email support@allthingsn.com. We answer every message and keep responses on the same thread.
The story
Meet Cartwise — Offline grocery price book
Read the full write-up · 4 min →
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