AI readout · Local-first
Know what to train today, and why.
Eccentryx reads the sets, reps, and RPE you log, then gives you one decisive call. No wearables, no cameras, no third-party data.
- No account needed
- No cloud required
- No credit card, no trial clock, no subscription
- Runs in your browser
- Yours to export or erase
Why local-first?
The core log starts in this browser by default. Sync is optional for signed-in users; export or delete records whenever you want.
New · Free, no card
Build your own plan in 60 seconds.
Answer a few questions and the Eccentryx engine builds your split, exercises, and weekly volume — then train it in Gym Mode.
Your last logged set
——
From your own log on this device. Explore training tools
- 227exercises
- 6+tools
- Freetoday, no card
- Localfirst by default
Three surfaces, one glance each
Daily
Today
Your recovery × what the week needs → one readiness call.
Open TodayHow it works
Every session opens with one call: push, hold, or ease off. Today weighs the volume you have already logged this week against how recovered you report you are, then commits to a single recommendation instead of a dashboard you have to interpret. Because it reads your real logged work, not an estimate, the call reflects the training you actually did. You start each session with a decision, not a debate.
Input
Log
Add this week’s sets. Volume rolls up live, per muscle.
Open LogHow it works
Log is where the intelligence starts: enter each set’s weight, reps, and RPE as you lift. Your weekly volume rolls up live for every muscle group, so the picture is current the moment you finish a set, not after a sync. Nothing is inferred or filled in for you. The numbers the app reasons from are the exact numbers you entered, which is why every recommendation downstream traces back to real training.
Weekly
Weak-Link Report
Per-muscle volume vs. your ceiling → the fix-this-first list.
Open reportHow it works
Weak-Link charts each muscle group’s weekly volume against the recoverable ceiling you set for it, then ranks what is furthest behind. Instead of adding work to the lifts you already favor, you see exactly where your week is thin and fix that first. It is an audit of what you logged, not a guess about what you might have done, so the gaps it flags are real gaps in your own training.
How each feature works
Today’s Call
You stop second-guessing whether you are overtrained. Today’s Call reads your accumulated volume and recovery notes, then returns a single verdict: push, hold, or ease off. Instead of staring at a readiness score and wondering what it means for your training, you get a decision you can act on. The anxiety of daily load selection disappears, replaced by one clear instruction grounded in the work you already logged.
Autoregulated Prescription
Your program stops being a static sheet you fight against. As you report RPE, reps, and velocity loss on each set, Eccentryx recalculates your load recommendation and tells you to add weight, hold, or back off. The bar speed and effort you actually produced shape the next set, not a percentage you wrote down weeks ago. You train at the intensity your body is delivering today, not the intensity you predicted.
Weak-Link Report
You finally see which muscle groups are actually undertrained. The Weak-Link Report scores every muscle’s weekly volume against its recoverable ceiling and flags what is lagging furthest behind. No ego, no guesswork about whether your arms or your back needs more work. You get an honest, ranked picture of where your programming has left gaps, so the next block targets the tissue that actually needs it instead of the lifts you enjoy.
Personalized Plan Generation
Your training blocks are built around you, not a template. Eccentryx generates personalized programming based on your goals, experience level, and the performance history you have logged. As your logged data grows, the plans adapt to what your body responds to and what it does not. You get a program that reflects your actual training history and stated objectives, not a generic split handed to every lifter who shares your broad category.
Why Eccentryx
Honest, not hyped
Reads your actual logs. No generic plans, no guesswork.
Free, not freemium-bait
The core is free today, no card. Upgrade only if you want more.
Yours, not locked in
Export or erase your data anytime. Local-first by default.
The engine reads your logs so the information side of training is free and honest — no gatekeeping, no guessing.
Where this is going
Training knowledge shouldn’t cost what a session with someone costs — it’s information, and information can scale for free. What it can’t replace is a real person cheering you on. So as your own logged progress becomes real and advanced, the plan is to let you help newer lifters the same way someone once helped you — always labeled as a peer, never a substitute for this page’s own honesty or for medical care.
Sample path · illustrative, not live data
- 01Browse the AtlasFree exercise library, no account
- 02Log a set freeLocal-first, no card
- 03Structured planLocal+ $4.99/mo · Pro $9.99/moSee plans →
Browse the exercise library
227 exercises with honest form cues, muscle emphasis, and safe substitutions — free to read, no account.
Push
Pull
Legs
See all 227 exercisesFree training tools
Calculators, analyzers, and visualizers — free, no account. Part of the Eccentryx toolkit.
Questions
Why no wearable or app integrations?
Because clean signal beats more signal. Wearables add noise: spurious steps, optical heart rate drift, sleep stages guessed from motion. Eccentryx coaches on what you actually did under the bar, the load you moved and the effort you reported. Manual logging forces intention. You record what matters, and the coach reasons from that. Integrations would import data you did not choose and could not verify, then quietly shape your program around it. Your logbook is the ground truth, and we keep it that way.
Is Eccentryx really free?
Yes, the website’s Free Mode, Atlas, and public tools are free today with no card. Local+ ($4.99/mo) and Pro ($9.99/mo) are optional paid subscriptions you can start anytime from the plans above — billed securely through Stripe, cancel anytime.
Do I need an account?
No account needed for the free website tools. Existing subscribers sign in only to manage their account or billing; optional paid cloud sync belongs in the native app.
Is my data stored in the cloud?
The free website tools start in your browser by default. Optional paid cloud sync is part of native-app access, not a requirement for using this website.
What does “local-first” mean?
Your training data lives in your browser first. You can export or erase it anytime. Sync to the cloud is opt-in, not default.
Is this medical advice?
No. Eccentryx provides training guidance only — not medical advice, not a medical device, and not intended to diagnose, treat, cure, or prevent any condition.
Plans
Free
Free
- Free Mode set logger
- Atlas (227 exercises)
- Public training tools
- Local export and erase
Local+
$4.99/mo
- Everything in Free
- Cloud sync across devices
- Long-term analytics
- Account-based backup
· cancel anytime
Pro
$9.99/mo
- Everything in Local+
- Advanced analytics
- Priority features
- Full data export
· cancel anytime
Billed securely through Stripe. You’ll sign in or create an account, then enter payment. 14-day full refund on your first charge; renewals are non-refundable. Already subscribed? Manage or cancel.
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Start free
Free Mode
Log one honest set — no setup, no account needed. Explore the public training tools whenever you’re ready.
Explore training toolsWhat “free” means here
Free today, no card, no trial timer: the website tools start in this browser by default. Local+ and Pro are optional paid subscriptions you can start anytime from the plans above, billed securely through Stripe.