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Apps I've Made

My current iOS apps. I welcome feedback via Twitter at @Joe_Duffy.


Overamped Icon

Overamped is a Safari Extension that redirects AMP and Yandex Turbo pages to their canonical versions, no matter how the page was opened.

Four Squares

Four Squares Icon

Four Squares is a game of memory, skill, and concentration available for iOS, iPadOS, and macOS. Watch what happens each turn and replay what you see.


Scanula Icon

Scanula is a clean, modern, and fast QR, data matrix, and barcode scanner.


Nevis Icon

Find and install applications found in DMGs and ZIPs.

Configurable to watch directories, ask before performing actions, moving used files to trash, and is completely free to try.


Gathered Icon

Gathered makes it easy to view, record, and share over 20 data sources available on iOS and iPadOS devices, including the GPS, accelerometer, and magnetometer.


pastelghouls Icon

6 ghoulish stickers!

All of my apps are released in my company's name, Yetii Ltd.