A fast, private, no-account fitness app for Android. Log sets, chase PRs, and build streaks — everything stays on your phone. Built natively with Kotlin + Jetpack Compose, ported feature-for-feature from a hand-built HTML prototype.
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Grab the latest signed APK from Releases and sideload it — no Play Store, no account, no server. On your phone: allow "install from unknown sources" for your browser/file manager, open the downloaded APK, and install.
- 🔒 Private by design — no login, no analytics, no cloud sync. Your workout history never
leaves your device (Room + DataStore only).
allowBackupis off, so it's not even swept into Android's cloud backup. - 📴 Works with the network off — the app, your data, and your workouts are 100% local. (Exception: exercise demo GIFs stream from a CDN on first view per exercise — everything else, including logging, PRs, streaks, and history, works completely offline.)
- 🏋️ 1,300+ exercise library — searchable, filterable by muscle group, each with step-by-step form cues and an animated demo.
- 🆓 Free and open source — MIT licensed, no ads, no in-app purchases.
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- Splash → 3-slide onboarding → home in the fewest taps
- Home — time-aware greeting, today's workout hero card, 7-day streak strip, weekly quick stats, browse-by-muscle shortcuts
- Exercises — live search + muscle filters over 1,300+ seeded exercises, personal-best badges, one-tap quick-add
- Exercise detail — animated demo (Coil GIF with graceful fallback), PR / last-trained stats, target progress, how-to-perform cues
- Workout builder — reorder exercises, per-exercise set steppers, intensity segmented control
- Guided session — work/rest state machine with a live progress ring, weight/rep steppers prefilled from your last set, PR detection mid-set, rest controls, and a completion summary with PR celebration
- Progress — weekly goal ring, volume bar chart, personal records, goals/targets, recent session history
- Settings — kg/lb units (with real conversion, not just relabeling), sound/haptics, auto-rest, configurable rest timer, two-tap "clear all data"
All data is local (Room + DataStore). Empty states show real zeros — never fake demo data.
Kotlin · Jetpack Compose · Material 3 · Navigation-in-Compose · Compose Animation · Room ·
DataStore · Coil (+ coil-gif) · manual DI (no Hilt). Single-activity, Compose-only. minSdk 26.
Requires JDK 17 + Android SDK (compileSdk 35). A local.properties with sdk.dir is
git-ignored — Android Studio generates one automatically on first open.
./gradlew installDebug # build + install on a device/emulator
./gradlew assembleDebug # debug APK only
./gradlew testDebugUnitTest # JVM unit tests (domain + seeding)
./gradlew testDebugUnitTest --tests "com.getfit.domain.SessionEngineTest"
./gradlew lintDebug # Android lintapp/src/main/java/com/getfit/
├─ core/{theme,anim,ui} design tokens, springs, reusable atoms, icon map
├─ data/{db,prefs,repo} Room, DataStore, repositories, dataset seeder
├─ domain/ pure business logic (PR/1RM, streak, week-agg, session engine) — unit-tested
├─ di/ AppContainer (manual DI) + ViewModelFactory
└─ ui/ AppViewModel + per-screen composables + RootScaffold
The bundled dataset ships a media_id per exercise but not the GIFs themselves (the original
host went dark and hotlinking is blocked). core/Constants.MEDIA_BASE points at a pinned,
immutable community mirror served via jsdelivr; demos load {media_id}.gif through Coil with a
shimmer-then-fallback-icon flow, so the app still works fully offline or if a given GIF is
missing — you just lose the animation for that exercise.
Issues and PRs are welcome. GetFit.dc.html (the original HTML/JS prototype) is the source of
truth for design, copy, and business-logic behavior — see CLAUDE.md for the full
porting guide and architecture notes before making changes.
docs/superpowers/specs/— design specdocs/superpowers/plans/— phased implementation planCLAUDE.md— architecture and porting guide for contributors
MIT — see LICENSE.