Delts is a workout planner and tracker for iOS, and the whole thing is open source under MIT. If you want to see how a timer-first fitness app is put together in SwiftUI, the repo is right there.
What you'll find inside:
- A SwiftUI codebase targeting iOS 17+, using a Lock Screen Live Activity for the active-session timer.
- A daily workout board built from exercise cards: sets, reps, RPE, target muscles, equipment.
- An exercise library of 845 entries with muscle, equipment, level, and split-based browsing.
- Optional Apple Health integration to import and write weight, body fat, and workouts.
I build solo and I'm an ACE Certified Personal Trainer, so the domain model reflects how training actually works rather than a generic CRUD app. Reading real SwiftUI that ships to the App Store tends to be more useful than another todo-list tutorial.
Issues and PRs welcome. It's MIT, so fork it, learn from it, or build on it.
Open source on GitHub:
https://github.com/apoorvdarshan/delts
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