Open sourceOffline-first appFree web tools and guides
Track. Progress. Evolve.
One open-source training system, in two places that work together: a free, offline-first Android app for programs, sets, body check-ins and food, and this site, with 17 calculators, an evidence-based knowledge base and a knowledge check that run in any browser.
- 17
- Free calculators
- 20+
- Evidence-based guides
- 0
- Accounts needed
- MIT
- Open-source (MIT)
Android beta · install today
One app for the whole training loop.
Five tabs cover the program you follow, every set you log, how your body responds, what you eat and what you learn. Fully offline, no account needed.
Morning, Ric
Today's energy
2,759 kcal
Maintain phase · week 3 of 12
This week
4/5 · 12-day streakQuick actions
Your day, at a glance
Home opens on today's energy target, the week's training strip and the next session. Pin the actions you use most and start a workout in one tap.
Free, open source, no account required. iOS is next.
On the web
The app tracks it. The web explains it.
Seventeen calculators and a bilingual knowledge base, free and open, built on the same formulas as the app.
See it the moment you type.
Every input recalculates instantly, no submit button. Results are colour-coded against healthy ranges and shareable in one tap.
- Instant: runs on every keystroke
- Colour-coded ranges and goals
- Share or save any result
Maintenance (TDEE)
MaintainExample: maintenance calories, with cut / maintain / bulk targets.
- 1RM Calculator
- TDEE Calculator
- Macro Calculator
- Body Fat Calculator
- BMI Calculator
- Ideal Weight Calculator
Plain-English, evidence-based.
Every guide explains the why (formulas, ranges and trade-offs) with sources you can check.
- Written for humans, not textbooks
- Cited, reviewed and kept current
How to read your BMI
BMI is a screening tool, not a diagnosis: it can't tell muscle from fat, which is why many athletes read as “overweight”.
Plans
Free is the plan. Premium is sync.
Use Metri with no account, with a free one, or with Premium cloud sync. Nothing in the product is paid today.
Local
Free
No account. Everything stays on your phone.
- Every feature and every update
- Export and import your data any time
- Data lives only in this phone (SQLite)
- No recovery if the phone is lost
Free account
Free
Email or Google / GitHub, no card.
- Password and recovery managed by the server
- Profile restore after a reinstall
- History and favorites on metri.info
- Release emails you can turn off
Premium
Free in beta
Cloud sync and backup, on request.
- Automatic sync of training, body and food data
- Unlimited devices, always in sync
- Synced activity views on the web
- Future apps included (watch in progress)
Premium needs a free account first. During the open beta it is granted on request by email; there is no payment, card or trial. Details in the Terms.
- Works fully offline
- JSON export and import
- MIT licence · no ads, no tracking