The short version: most workout apps claim to work offline but quietly break when you're underground — they can't load plans, sync sets, or show history without a ping. The six apps below were verified for full no-signal operation: install, walk into a Faraday cage, train, come out with a complete log.
We ranked on four criteria: offline reliability (does it work cold with zero signal?), progressive overload (does it help you add weight intelligently?), custom programming (can you build your own plans?), and pricing honesty (subscription vs pay-once).
Disclosure: Personal Trainer is published by Mobile Squad, the publisher of this guide. We've tried to be honest about its trade-offs; the comparison apps are listed as their users actually experience them.
Personal Trainer — Mobile Squad
What it does: Full gym companion — custom plan builder, set/rep logging, personal record tracking, rest timer, muscle recovery estimator, and a friends training mode. Runs entirely on-device; the optional cloud backup is encrypted and entirely opt-in.
Offline: 100% functional with no signal. Plans load instantly, history persists locally, and the progressive overload engine reads from on-device data only. Tested repeatedly in mobile dead zones.
Progressive overload: The standout feature. The app tracks your actual performance against targets, detects when you consistently hit the top of a rep range, and suggests the next sensible load increment — rounded to real plate jumps (2.5 kg / 5 lb on compounds, 1 kg / 2.5 lb on isolation). It adapts to your actual numbers, not generic percentage tables.
Pricing: Free download with core features. One-time VIP unlock for advanced features — no subscription, no monthly fee, no feature drip.
Trade-offs: No web companion or desktop client (phone-only). Social features are local/friend-invite rather than a global leaderboard. Android-first; iOS version available.
FitNotes
What it does: Simple, clean workout logger. Exercise history, 1RM estimator, basic charting. No account required, no cloud sync.
Offline: Fully offline by design — there is no network layer at all. Data lives in a local SQLite database you can back up manually.
Progressive overload: No automatic progression suggestions. You review your history and decide what to add — works fine if you prefer manual control.
Pricing: Free. No in-app purchases, no subscription. Android only.
Trade-offs: No iOS app. UI is functional but dated. No plan builder — you pick exercises per session rather than following a saved programme. No rest timer built in.
Gym Notebook
What it does: Workout log with a clean, paper-notebook-style interface. Custom exercises, plan builder, set/rep/weight tracking, rest timer. Cross-platform (Android & iOS).
Offline: Core logging works offline. Cloud sync (iCloud or Google Drive) is optional — the app functions fully without it.
Progressive overload: No automated suggestions. Shows previous session weights when logging so you can manually decide whether to progress.
Pricing: Free with ads; one-time paid upgrade removes ads and adds a few extras. No subscription.
Trade-offs: No progression automation. Smaller exercise library than Personal Trainer or JEFIT. Less active development.
Strong
What it does: Well-designed lifting tracker with clean log flow, 1RM calculator, plates calculator, plan builder. Popular on iOS. Account required.
Offline: Logging works offline once logged in. First setup and plan downloads require a connection. Local data is cached; cloud sync uploads when signal returns.
Progressive overload: Basic "1-rep max progression" feature in paid tier. Not as granular as Personal Trainer's load nudge engine.
Pricing: Free tier (3 active routines). Monthly or annual subscription for unlimited routines, custom exercises, and progression features.
Trade-offs: Subscription required for full use. Account mandatory. No pay-once option. Recurring cost adds up over years.
Hevy
What it does: Workout logger with a social feed. Log sets, follow friends, see their workouts, share routines. Clean UI, good charting.
Offline: Partial. Core logging works without signal once authenticated. Account creation and routine syncing require a connection. Data is cloud-primary — local caching is secondary.
Progressive overload: Shows previous session inline. No automated weight progression suggestions.
Pricing: Free with limits. Hevy Pro subscription unlocks unlimited routines and analytics.
Trade-offs: Social-first design means network dependency is baked in. Not ideal for strict offline use cases. Account and data are cloud-resident by default.
JEFIT
What it does: Large exercise database (1,300+ exercises), community plans, detailed muscle-group charting, and body-stat tracking.
Offline: Weak. Plans and exercise data are server-fetched; in a dead zone mid-session you may hit loading spinners. Pre-downloaded plans work, but reliability degrades significantly without signal.
Progressive overload: Basic weight/rep logs. No automated progression engine.
Pricing: Free with ads and limits. JEFIT Elite subscription for full database access and analytics.
Trade-offs: Not truly offline-first. Exercise library breadth is the main draw — if you train somewhere with signal, the database is genuinely useful.
Comparison summary
| App | Offline | Progression | Plans | Pricing |
|---|---|---|---|---|
| Personal Trainer | ✅ Full | ✅ Auto | ✅ Custom | Pay-once |
| FitNotes | ✅ Full | Manual | Per-session | Free |
| Gym Notebook | ✅ Full | Manual | ✅ Custom | Free / one-time |
| Strong | Mostly | Basic (paid) | ✅ Custom | Subscription |
| Hevy | Partial | Manual | ✅ Custom | Subscription |
| JEFIT | Weak | Manual | Community | Subscription |
What makes an app truly offline?
There's a difference between "works offline" (can log a set when disconnected) and "offline-first" (all data, plans, and features live on-device by default, with sync as an optional extra). The first three apps above are offline-first. Strong and Hevy are offline-capable. JEFIT is neither.
For basement gyms, underground commercial gyms, travelling, or anyone who values data privacy, only offline-first apps make sense: your data exists whether or not a server is reachable.
FAQ
What is the best offline gym tracker app for Android in 2026?
Personal Trainer by Mobile Squad is the strongest all-round offline-first option: full functionality with no signal, smart progressive overload, custom plan builder, and a one-time unlock. FitNotes is the best free-forever pick if you don't need automated progression.
Do any gym tracker apps work with no Wi-Fi or mobile data?
Personal Trainer, FitNotes, and Gym Notebook are all verified to run entirely on-device — no signal needed after installation. Strong and Hevy require network for initial account setup and sync, but core logging works offline once set up. JEFIT needs a connection for plan content.
Which gym tracker has no subscription?
Personal Trainer (pay-once VIP), FitNotes (free forever), and Gym Notebook (free with optional one-time upgrade) all avoid recurring fees. Strong and Hevy both use subscription models for full access.
Is there a gym app with automatic progressive overload?
Personal Trainer has the most capable progression engine of the apps tested — it reads your actual set history, detects when you consistently top out your rep range, and suggests load increases rounded to real plate increments. Strong has a basic version in its paid tier.