DevHacker Newsabout 2 hours ago
User Reverse-Engineers Gym App QR Logic
5 min read
A user reverse-engineered a gym app's QR code system by using a rooted Android phone and DeepSeek v4.1 Flash, bypassing forced social media feeds. The process involved extracting keys from plain text logs and building a SvelteKit web app to generate codes locally, successfully allowing check-in and check-out without the social feed.
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