Keep every loyalty, rewards & membership card in one private app. Scan once, show the barcode at checkout. Works fully offline, no account, Face ID locked.
Stack your cards, ditch the clutter.
Key Stacker turns your phone into a single, tidy wallet for every loyalty card, membership, gym pass, and library card you carry. Snap the barcode once and it's ready whenever you need it — no account, no sign-up, no internet
Add cards in seconds
Point your camera at any barcode or QR code and Key Stacker captures instantly. Supports all the common formats — QR, PDF417, Aztec, Data Code 128/39/93, Codabar, EAN, UPC, and more — so if a store can scan it, you can stack it.
Built to scan
Open a card and Key Stacker jumps to full brightness and shows the code big and crisp. Pinch to resize it, rotate wide barcodes to fill the screen, let any reader pick it up on the first try. Each card remembers your preferred size.
Stay organized
Tag your cards, mark favorites, and search or filter to find the right fast. Add notes, pick an accent color, and snap photos of the physical card for reference.
Yours and private
Everything lives on your device. Lock the app behind Face ID, hide it from the app switcher, and back up or restore your whole wallet with a single shareable file.
Key Features
- Store unlimited loyalty, rewards, and membership cards
- Scan QR codes and barcodes in 10+ formats
- Works 100% offline — no account, no signup
- Local-only storage with Face ID lock
- Full-screen mode with brightness boost for reliable scanning
- Tags, favorites, and notes
- Backup and restore
No ads. Just your cards, ready when you are.
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://gist.github.com/dinitiatives/d818654ad0c96fa9d76358da7731e115#file-key-stacker-privacy-md
Ratings & Reviews
This app has not received enough ratings or reviews to display an overview.
- Apple Wallet export: send any card straight to Apple Wallet and show it from your lock screen.
- Faster, more reliable barcode scanning.
- Bug fixes and polish.
Version 1.1
The developer, Didactic Initiatives LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Usage Data
Privacy practices may vary based, for example, on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
Dark Interface
Sufficient Contrast
Information
Provider
Didactic Initiatives LLC
Size
55 MB
Category
Shopping
Compatibility
Requires iOS 16.4 or later.
iPhone Requires iOS 16.4 or later.
iPad Requires iPadOS 16.4 or later.
Mac Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.