The author, frustrated with the slow and cumbersome PureGym app, reverse-engineered the API to create an Apple Wallet pass that allows for quick entry to the gym. The author discovered security vulnerabilities and inconsistencies in the app's design, including an 8-digit PIN that hasn't changed in eight years. The project took a weekend to complete and has saved the author 3.8 hours of annual friction. The author questions why PureGym hasn't implemented a similar solution despite having the resources to do so.