Your fitness app sells your data, distracts you with a social feed, and breaks the moment you lose signal. THYMOS doesn't. Offline-first workout tracking for lifters who want speed, privacy, and zero bullshit.
Building for Android first. iOS to follow.
Join the list — your closed test invite link lands straight in your inbox.
Closed testing only. Removal requests: hello@thymos.fit.
Workout logs aren't just numbers — they're a biometric fingerprint of your body, habits, and schedule. Most fitness apps treat that data as a product. THYMOS treats it as yours. Everything stays on your device by default. No behavioral tracking. No third-party data sharing. Sensitive fields — like readiness scores and wellness context — never leave your phone, ever.
I'm building THYMOS because I'm tired of fitness apps that treat your data as their product and your attention as their revenue. As a lifter and a developer, I want a tool that respects both the craft and the person behind it. Just an honest tool for honest training. If we are on the same page, welcome aboard.
Most fitness apps are built to keep you scrolling. THYMOS is built to get out of your way.
Not another fitness app with a social feed. THYMOS is a precision instrument for people who take training seriously.
Instant workout starts, custom templates, and progressive programs. Go from idea to action in seconds.
Your data lives on-device. No account required. Export everything as CSV or JSON anytime. No lock-in.
Trends, estimated 1RM, set volume, and muscle heatmaps. Measured data and estimates are always clearly separated.
Works completely offline — always. Cloud sync is optional and only used for backup, never required.
Open the app and start lifting. No email, no account, no internet required. Link an account only when you want multi-device sync.
Import from Strong, Hevy, FitNotes, or Excel. Export anytime as CSV or JSON. Your history, always yours.
THYMOS reads the RPE and RIR you log during each set and automatically suggests the right weight for your next working set. No guesswork, no spreadsheets — just data-driven progression built into your workflow. Don't want a suggestion? Dismiss it with one tap and enter your own weight.
Evidence-based warm-up prescriptions, built automatically from your working weight. THYMOS ramps you up with the right loads at the right intensities — so you walk into every working set fully prepared.
Enter your target weight and get an instant, balanced plate setup — no mental math, no guesswork, just bar-ready precision. Log what you actually lift by selecting the plates on the bar. The app calculates total load automatically for cleaner tracking.
Muscle distribution heatmaps show you exactly which muscles you've trained, how intensely, and what's been neglected. Turn your sessions into a clear map of your training balance — and guide what to push next.
Trends, estimated 1RM, set volume, and full workout history — all in one place. Measured data stays measured. Estimated data is clearly marked. We never mix the two to make numbers look better than they are.
Import from Strong, Hevy, FitNotes, or Excel — all your previous training data comes with you. And when you want to leave, export everything as CSV or JSON. Your data is always portable. Always yours.
First 100 testers get lifetime Pro — for free.
Join the list — your closed test invite link lands straight in your inbox.
Closed testing only. Removal requests: hello@thymos.fit.
See the Roadmap →