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.

Free today, no card. Local-first.

Build your free plan — 60 seconds Log a set free
  • 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.

Preview a theme:

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.

Build your free plan

HOW IT WORKS

  1. Log your sets

    Weight, reps, and RPE — saved on this device as you lift. Nothing inferred, nothing filled in.

  2. Get the call

    One decisive readout from your own logs: what to train today, and how hard.

  3. Watch the weight move

    Hit your sets and the next session steps the weight up. A hard day eases it. Only the load moves — reps and effort targets stay yours.

ASK ECCO

Meet ECCO — your AI training coach.

Any training question — form, programming, plateaus, your plan — answered honestly, grounded in your AGFI readout (your logs, your saved plan, your gym sessions) when you choose to share it. Free while in beta.

Your question (and stats only if you tick the box) is sent to our AI service to generate the answer. Nothing is sent until you press Ask.

THE IN-RACK COCKPIT · GYM MODE

Zero guesswork in the rack.

Gym Mode is your distraction-free cockpit in the rack — guesswork stripped from every rep, load, and rest interval. One progression engine parses the sets you actually log: experience-scaled starting loads, a weight-up call after a full session, a hold when you cut sets short, and a joint-flag deload that backs the next target off 10% when something hurts.

  • 44px controlsevery button stays hittable with mid-set hands, at any fatigue
  • Live joint-range feedbackthe moving joints’ real degree read for every rigged lift, straight from the kinematics engine
  • Metabolic recovery timersrest scaled to the energy system each set drains — ATP-CP, glycolytic, or aerobic — with the matching chip recommended
  • No fake numbersan estimate is labeled an estimate until your logged sets replace it
Enter Gym Mode Build your free plan

The free log is free today — no surprise paywall.

Plans

Free

Free

  • Free Mode set logger
  • Atlas (227 exercises)
  • Public training tools
  • Local export and erase
Start free

Local+

$4.99/mo

SAMPLE · 12-week e1RM trend

Long-term charts like this, from your own synced log.

  • Everything in Free
  • Cloud sync across devices
  • Long-term analytics
  • Account-based backup

· cancel anytime

Pro

$9.99/mo

SAMPLE · Score 71 · the breakdown

  • Intensity18/25
  • Density16/25
  • Progression20/25
  • Consistency17/25

The Score number is free today — Pro reveals what drives it.

  • 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.

Popular exercises from the Atlas · 227 free guides

Push

Pull

Legs

See all 227 exercises

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.