1
I accidentally became PureGym’s unofficial Apple Wallet developer
How I reverse-engineered PureGym's API to build a working Apple Wallet pass with PassKit, Vapor, and mitmproxy - end-to-end iOS reverse engineering walkthrough.
Vadim Drobinin
Senior iOS engineer & consultant. 15+ years shipping apps for medical, fintech, and consumer. SwiftUI, TCA, on-device ML, HIPAA. Apps acquired by Twitter, featured by Apple, CES & Webby honours.
- Popular posts
- 8
- Total points
- 2,273
- HN comments
- 912
- Rank
- #703 personal
Visit drobinin.com → RSS feedOn Hacker News Dec 2019 – May 2026
Life, Learning & Writing 5Software Engineering 3Web & Frontend 1Society, Policy & Culture 1Networking & Internet 1Hardware & Electronics 1
2
Designing software for things that rot
Building an iOS fermentation tracker with HACCP-style decision trees for home charcuterie, salami curing, and fermented foods - food safety without internet strangers.
3
The Whole App is a Blob
Building a Tamagotchi-style language learning iOS app with SwiftUI character animation - on drill design, motivation loops, and where Duolingo gets it wrong.