Your Grind.Etched.

The calisthenics workout log that witnesses every set and understands it.

For athletes, ready to own their training program and the work that comes with it.

Download on the App StoreGet it on Google Play

Clean. Focused. Yours.

A workout log that stays out of the way. Build a workout in seconds. Log every set as it happens: reps, holds, tempo, rest, supersets, both sides. Free forever. No ads, no streaks, no badges.

  1. Name it, add the exercises, set targets and rest. Seconds, not minutes.

  2. Every set as it happens. Reps, holds, tempo, both sides.

  3. The timer counts it down. The next set is already lined up.

  4. Every set, every rest, how hard it felt. One screen.

  5. Each workout keeps its sets, its notes and what XTA saw in it.

  6. Every exercise climbs its own path. The work adds up where you can see it.

Building a workout: exercises with sets, targets and rest Logging a hold during a workout Rest timer between sets Workout summary with duration, effort and every set A past workout with its exercises and feedback Progression paths and the week at a glance

Intelligence that works
in the background.

Watches your journey. Elevates without shouting.

Kraft, a real example

  • Muscle up 3 × 4
  • Weighted pull up +20 kg 4 × 8
  • Weighted dips +20 kg 4 × 10
  • Hollow body hold 3 × 35 s

+ 4 more exercises, with sets, reps, tempo and rest

Feedback, a real example

What went well

Planche leans: 23 s on all three sets, past your 20 s target.

Areas for improvement

Wall handstand: 60 s on the first set, 48 s on the next. The long first hold cost you the second.

Actionable steps

Cap handstands at 50 s. Move planche leans up to 3 × 25 s.

Chronicle, a real example

Wins

One arm push-up: 7 reps per side, a new best.

The story

Five weeks ago, your first straddle front lever holds. Three weeks ago, back from 18 days off, fighting for 3 sets of 6 one arm push-ups. This week, 7 per side and +20 kg on dips and pull-ups.

Path forward

Cap muscle-ups at 4 sets of 5 before the weighted work.

Reflection, a real example

How you train

You're strongest early in the week. Straddle planche: 13 s in the first workout of the week, 8 s later on.

What gets in the way

Advanced tuck front lever: 30 s, unchanged for 23 weeks.

Claude + ChatGPT, a real example

“Look at my week and set up Thursday's push workout.”

It's waiting in the app when you step up to the bar.

Connect Claude or ChatGPT

That's not five features. That's a witness to your grind.

Getting started.

Your first workout starts the record.

  1. Install. Sign in with Apple or Google, answer a few questions about how you train, and turn feedback on when the app asks.
  2. Train. Log today's workout set by set, as it happens. Not sure what to train? Kraft builds one on the spot.
  3. Read what XTA saw. A minute after you finish, your feedback lands. One free every week, every workout on Apex.

The full guide to your first workout

What step 3 looks like

You log

Dragon flag · 3 × 10

Set 1
10 reps
72 s
Set 2
10 reps
65 s
Set 3
10 reps
54 s
XTA sees

The tempo slipped

All 30 reps, but time under tension fell from 72 s to 54 s. The 4-second lowering slipped as fatigue set in. Next time keep the 4 seconds. If that means 8 reps on the last set, take the 8.

Download on the App StoreGet it on Google Play

XTA is free. Forever.

The full log, one Feedback and one Kraft a week.

XTA Apex, $9.99/month: feedback on every workout, Chronicle, Reflection in full, Claude + ChatGPT.

The science behind
every rep.

Motion Science. Real reps from real athletes, rebuilt in 3D. Free, public, no account.

Not a video, not a drawing. A figure you turn in your hands, showing what a camera can't: where the load goes and which muscles carry it.

Front lever rebuilt in 3D, movement view: the figure you can turn from any angle

Movement

Turn it in your hands. Every angle, every phase of the rep.

Front lever physics view: gravity, the push through the bar and the balance point drawn as forces

Physics

See the load. In a front lever, your shoulders work like holding about 20 kg at arm's length.

Front lever body view: lats, rear delts and core lit in rose as the working muscles

Body

See which muscles do the work. They light up as the rep moves.

70+ movements across 30+ progression paths, from first step to milestone. A coaching read, not a lab measurement.

Explore Motion Science
The founders of XTA

Built by athletes
who got tired of the noise.

We've been training calisthenics for years. We tried every app. They all sold us programs, crammed the screen with videos we didn't need, and turned our training into badges and streaks.

We didn't want motivation. We wanted a clean app to do our work, and something smart enough to see what we couldn't. So we built XTA. The app we wished existed.

We're data scientists and engineers by trade. We've spent a decade building systems that learn from data. XTA isn't a logger with tricks bolted on. It's built by people who understand both the data and the grind. We use it every morning.

Questions.

Is XTA free?
The log is, forever. You also get one Feedback and one Kraft workout a week. XTA Apex, $9.99/month, raises that to up to ten of each a week and adds Chronicle, Reflection in full and Claude + ChatGPT.
Does XTA give me a program?
Not a fixed one. Kraft builds your next workout from your history, your intent and your constraints. Or plan your training with Claude or ChatGPT and they write the workouts straight into XTA. Or build your own in seconds.
Which devices?
iPhone, Apple Watch and Android.
What can I log?
Reps, timed holds, tempo, rest, supersets, left and right sides, added weight and notes.
How is the feedback different from asking a chatbot?
It sees every set you've logged across your recent workouts, tempo and rest included, and it's written the minute you finish.
Can I program my training with Claude or ChatGPT?
Yes, on XTA Apex. XTA speaks MCP, so Claude, ChatGPT or any MCP client can read every set you've logged, your feedback and your Chronicle, then write new workouts into the app, ready to train. It never edits or deletes what you already have. See Connect Claude or ChatGPT.
Who owns my data?
You do. Delete it from the app any time, or ask support for a full export. XTA is run by a Danish company under GDPR.