GymTracker

A simple, single-user iOS app for tracking gym workouts and progress over time. SwiftUI + SwiftData, iOS 17+. No login, automatic saving, optional light/dark theme, and Markdown export.

Screenshots

Today	Progress	Exercises

Settings	Dark mode

Running it

1. Open GymTracker.xcodeproj in Xcode (16 or newer).
2. Select your iPhone (or a simulator) as the run destination.
3. To run on your own device: select the GymTracker target → Signing & Capabilities → set Team to your Apple ID. (Free Apple IDs work; the app just needs re-signing every 7 days unless you have a paid developer account.)
4. Press ⌘R.

How it works

• Today — opens automatically on today's date. Use the ‹ › arrows or the calendar button to move to any past date and view or edit that session; a Today button jumps back. Tap + to add an exercise, then add as many sets as you like. One shared set of controls stays pinned at the top while the exercises and their sets scroll below. Each set is a single tappable line; the selected set (highlighted, across any exercise) is the one the pinned +/- controls edit. The panel has quick-jump chips (20–120) so you can hit 80 in one tap; the weight step (1 / 2.5 / 5 / 10 kg) is set in Settings. When the selected set belongs to a bodyweight exercise the weight controls grey out and only reps stay editable. New sets pre-fill from your last set, and a fresh exercise pre-fills from the last time you did it. Use Add Warm-up (weighted lifts only) for deliberately light warm-up sets: they're labelled "Warm-up" (dashed outline), stay fully editable, but are excluded from every progress metric so they never skew your numbers. Everything saves instantly — there is no save button.
• Progress — pick an exercise to see your trend. Weighted lifts show an estimated 1-rep max (Epley: weight × (1 + reps/30)), which folds weight and reps into one strength number so progress is comparable even when reps vary, plus top-weight and total-volume charts. Bodyweight movements show best-set reps and total reps. Each headline shows the change since your first session.
• Exercises — add new movements, rename, reorder, delete, and toggle whether an exercise tracks weight (off = reps only, for pull-ups / sit-ups).
• Settings & export — the gear (top-left of Today) opens Settings, where you choose the appearance (System / Light / Dark) and the weight step. The share button next to it exports your full history as a Markdown file with a table per exercise per day — AirDrop it, save to Files, or send it anywhere.

Notes

• The 11 starting exercises are seeded on first launch. Bodyweight ones (pull-ups, chin-ups, sit-ups, one-arm pull-up) track reps only; the rest track weight. Toggle any of these in Exercises if you'd prefer otherwise.
• Each day is one session that can hold one or several exercises.
• Data lives on-device only.

Project layout

GymTracker/
  GymTrackerApp.swift    App entry + SwiftData container
  Models.swift           Exercise / ExerciseLog / SetEntry + metrics
  SeedData.swift         First-launch default exercises
  ContentView.swift      Tab bar + appearance
  TodayView.swift        Today's session
  ExerciseLogCard.swift  Per-exercise logging card + set rows
  Components.swift       +/- controls, step picker, preset chips
  ExercisesView.swift    Manage exercises
  AnalyticsView.swift    Progress charts
  SettingsView.swift     Appearance + weight step
  MarkdownExport.swift   Export history as Markdown
  PreviewData.swift      Sample data for Xcode previews only