An offline workout log for personal trainers

Gym floors have poor signal, trainers have seconds between sets, and client data is personal. The app had to be fast to use one-handed, work with no connection at all, and keep every client's information on the trainer's own device.

• Offline by construction. The release build declares no internet permission at all, so client data physically cannot leave the phone.
• Pixel-faithful to the design. Colour tokens converted exactly from the design file, with the design's own icon paths.
• Fast gestures, safe undo. Swipe, long-press and drag, with undo instead of confirmation dialogs.
• Data stored in metric, displayed in metric or imperial.

Beyond the original four screens, the app adds load per set, session tonnage, estimated one-rep max and personal bests, a rest timer that starts when a set is ticked off, weigh-in history with charts, a library of about 70 exercises plus custom ones, backup and restore, onboarding and settings. A suite of automated tests, including visual golden tests of every screen, keeps it stable as it grows.