Train Smarter.
Track Everything.
Periodized strength training and heart-rate-zone cardio in one app — 336 exercises, 16 set structures, and an RIR engine that decides what you lift next. The Android app trains with no signal, and the free tier is a complete training app.
Built for the Iron
Everything here ships today, and most of it costs nothing. The badge on each card says which is which.
336 Exercises
Every movement across 8 equipment types and 16 muscle groups, plus 15 built-in templates and as many custom exercises as you care to add.
16 Set Structures
Straight sets, drop sets, myo-reps, rest-pause, pyramids, supersets, intervals and more — with rest timers, isometric countdowns and haptics built into the loop.
RIR Progression Engine
Log your reps in reserve and the engine sets the next session's load and reps. The engine itself is free; how strictly it applies is a Pro setting.
LSHF Cardio Zones
5 heart-rate zones anchored to your lactate-threshold heart rate, planned alongside your lifting rather than bolted onto it.
Offline First, Then Synced
The whole training loop runs on Android with no signal and no account. Add an account and cloud sync, backup and multi-device come with it — at no cost, on the free tier.
Train With Friends
Friends, an activity feed, likes and comments on sessions you actually logged. The entire social layer is free.
Mesocycle Periodization
Prescriptive training blocks — mesocycles driving cycles driving workouts — so progressive overload is planned rather than remembered.
Full Analytics
Volume trends, growth per muscle group and all-time records. Summary stats stay free; the trends, growth and records behind them are Pro.
7 Languages
Localized down to the content, not just the chrome — every exercise name and description is translated, and Hebrew lays out right-to-left.
How It Works
Three steps, and none of them sit behind the paywall.
Build a Workout
Start from one of 11 workout templates or assemble your own from 336 exercises. Choose set structures, targets and rest.
Train It
Guided set-by-set logging with automatic rest timers, isometric countdowns and haptics. Log your reps in reserve as you go.
Track Your Progress
History, core stats and session summaries, with the RIR engine setting your next loads. When you want the whole block planned in advance, that is what Pro's mesocycles add.
What stays true at any tier
Works with no signal
Offline-first is not a fallback mode. On Android the whole training loop runs without a connection and an account is optional — a session logged in a basement gym is on your phone immediately, and syncs when you surface. In a browser you need a connection to load the app; after that your training data is local.
Your data is yours
Raw export in Markdown, CSV and JSON, generated on your device — no account, no network, no server round-trip, and complete enough to answer a GDPR portability request without asking anyone. Free, deliberately: gating the data dump would contradict everything else on this line.
No ads, no tracking
No advertising, no tracking, no third-party analytics or attribution SDKs — in the app or on this page, which sets no cookies and loads nothing at all from a third-party server. The only diagnostics the app sends are crash reports.
Read this site's privacy policySee It In Action
Designed with the same intensity you bring to your training.
Two Tiers, Neither Metered
Free is a complete training app — cloud sync, the whole social layer and your raw data included. Pro adds the prescriptive layer: periodized mesocycles, full analytics and deeper tuning.
Free
A complete training app, not a trial.
- Cloud sync, backup and multi-device
- The full training loop — all 16 set structures, rest timers, haptics
- 336 exercises, 15 templates, unlimited custom exercises
- Social — friends, feed, likes and comments
- Raw data export — Markdown, CSV and JSON
Pro
For lifters who want their training planned, not just logged.
- Annual Best value
about €4.17 a month · −48%
€49.99 per year - Monthly €7.99 per month
- Lifetime Founding price
Rises to €129 after the launch period
€89 one-time
- Mesocycles — periodized, prescriptive planning
- Live item-sharing — sending, and opening what you receive
- Full analytics
- Rich and PDF export
- Progression tuning — RIR strictness, per-equipment increments
- Systemic conditioning load — what your cardio costs a training block
- Priority support
Google Play is the seller and merchant of record. Renewal and cancellation are managed in your Google Play account. Prices are shown in EUR; Switzerland is billed in CHF at Google Play's rate.
There is no trial to run out and no tier that meters you. Whatever a tier gives you, it gives you in full. See all 17 capabilities side by side
What's Free, and What Pro Adds
10 of these 17 capabilities are free, including the two most apps charge for: cloud sync and the whole social layer. Pro includes everything in Free and adds the prescriptive half.
| Capability | Free | Pro |
|---|---|---|
| Cloud sync, backup and multi-device | Included | Included |
| The full training loop — all 16 set structures, rest timers, haptics | Included | Included |
| 336 exercises, 15 templates, unlimited custom exercises | Included | Included |
| Social — friends, feed, likes and comments | Included | Included |
| Raw data export — Markdown, CSV and JSON | Included | Included |
| LSHF cardio planning across 5 heart-rate zones | Included | Included |
| RIR-based progression engine | Included | Included |
| Workouts and cycles | Included | Included |
| Workout history and core stats | Included | Included |
| 7 languages, fully localized | Included | Included |
| Mesocycles — periodized, prescriptive planning | Pro only | Included |
| Live item-sharing — sending, and opening what you receive | Pro only | Included |
| Full analytics | Pro only | Included |
| Rich and PDF export | Pro only | Included |
| Progression tuning — RIR strictness, per-equipment increments | Pro only | Included |
| Systemic conditioning load — what your cardio costs a training block | Pro only | Included |
| Priority support | Pro only | Included |
Pro is about capability, never quantity. Neither tier caps how many workouts, cycles, mesocycles or custom exercises you create.
Questions Worth Answering
The ones this page would otherwise leave you guessing about.
What's the difference between Free and Pro?
What's the difference between Free and Pro?
Free is the complete training app — the whole training loop, cloud sync, the social layer and your raw data. Pro adds the prescriptive half: mesocycles, live item-sharing, full analytics, rich export, progression tuning, systemic conditioning load and priority support.
See the full comparison Is there an iPhone app?
Is there an iPhone app?
No, and none is planned. Strength Pro runs on Android and in any modern browser.
Do I need an account?
Do I need an account?
No. The whole training loop works with no account at all. Adding one gets you cloud sync, backup, multi-device and the social features — all of that is free. A Pro purchase does need an account, because the entitlement is tied to it.
Does it work without internet?
Does it work without internet?
The Android app is offline-first rather than offline-tolerant: you can plan, train, log and review with no connection at all, and everything syncs once you reconnect. A browser needs a connection to load the app itself; after that your training data lives on your device.
Why can't I buy Pro in the browser?
Why can't I buy Pro in the browser?
Purchases go through Google Play, and Google Play only exists on Android. It matters less than it sounds: an account that buys Pro on Android is fully Pro in the browser too, on every device you sign in on.
Where do I buy Pro?
Where do I buy Pro?
In the Android app, through Google Play. The listing is not open yet — until it is, the Google Play controls on this page say so rather than sending you somewhere that doesn't exist.
How do I cancel?
How do I cancel?
In Google Play, the same way as any other Play subscription. Google is the seller and merchant of record, so renewal, cancellation and refunds are handled there and Play's own terms are the ones that apply. Lifetime is a one-time purchase, so there is nothing to cancel.
What happens to my data if I stop paying?
What happens to my data if I stop paying?
Nothing is deleted. An in-progress mesocycle stops being enterable and the analytics charts, the rich export and the conditioning-load readout stop being shown — but every one of them comes back exactly as it was if you resubscribe, and so do Pro-tuned values, which revert to their free defaults meanwhile rather than being cleared. Items you shared are hidden from their recipients, who are told the share ended, and reappear when you resubscribe. Your own logged workouts, history and feed are untouched throughout — that is your data, and it stays yours.
What languages does it support?
What languages does it support?
All 7: English, German, French, Spanish, Hebrew, Russian and Chinese — including every exercise name and description, with right-to-left layout for Hebrew.
Stop Guessing.
Start Training.
Open Strength Pro in your browser and log your first workout in a minute. No install, no account needed.
Runs on Android and in any modern browser. The Google Play listing isn't open yet — Pro arrives with it.