Clearform reads the data you already have and tells you how ready you are, what is coming, whether it is working and proof your fitness is building. Plain language, on your phone, in under ten seconds. No new platform, no new account.
Free. Works on iPhone and Android. Requires a free intervals.icu account.
intervals.icu is one of the best training platforms there is: deep, precise, endlessly configurable. But depth takes time, and most mornings you just want the answer. Clearform connects through the official API and gives you exactly that. Ten seconds, one glance, on with your day.
Your intervals.icu account stays the single source of truth. Clearform reads it live and writes your changes straight back. Nothing to migrate, nothing to maintain twice.
The deep dives stay where they belong, in intervals.icu. Clearform is the layer on top that tells you what it all means, before your coffee goes cold.
I build Clearform because I train on intervals.icu myself. Independent, unaffiliated, and made with a lot of care.
Form, HRV, resting heart rate and sleep, each read against your own range. No mystery score, no red arrows, no black box. Tap any number to see exactly how it is calculated.
Every session is a dash, colored by sport. From your Monday run to your Friday yoga. Solid is banked, faded is planned, race days glow. Swipe back to what you have done, forward to what is coming. Try it below!
Six weeks of fitness climbing while fatigue spikes and settles around it: proof the hard sessions are landing. Switch to six months to see how far you have come. One plain line under the chart tells you what it all means.
Ahead: warmup, work sets, recoveries, block by block, so you arrive knowing exactly what is coming. After: scrub across the chart and compare your efforts against the plan.
Tempo moved to Thursday? Add a session, move, edit, delete it, or mark yourself sick, injured or away. It all writes straight back to your intervals.icu calendar, and tomorrow's guidance takes it into account instead of guilt-tripping you.
Your next race sits at the top of the app with a live countdown. Clearform projects your Form forward through the taper, day by day. No more hoping the plan works: watch yourself getting fresher as the start line approaches.
Clearform runs sealed inside your own browser. Your key is stored on your device and nowhere else, and every request goes straight from your phone to intervals.icu, encrypted. No Clearform server sees your training data, because there is no Clearform server.
No middleman. No accounts, no analytics, no cookies, no third-party fonts. This page is the only thing I host.
The free tier is plenty. Garmin, Wahoo, Strava, Zwift, Rouvy, Suunto, Coros, Polar, WHOOP: more than 200 apps and devices already feed intervals.icu, so your data is probably in there waiting.
In intervals.icu: Settings > Developer > API key. A couple of taps, no forms, not another password to remember. It never leaves your phone.
Open app.clearform.icu, paste your key, add Clearform to your home screen. From then on it opens signed in: one tap from lock screen to answer.
Works the same on iPhone and Android. No store, no download.
If it has a browser, yes. iPhone and Android both, and you get the same app on each, same layout, same features, no second-class version. It works on a laptop too, though it is built to be read one-handed.
You will not find it there, and that is on purpose. Clearform is a web app, so it installs straight from your browser with no store account and no download. On iPhone, open app.clearform.icu in Safari, tap share, then Add to Home Screen. On Android, your browser offers to install it, or use the menu and pick Add to Home screen.
Your key stays in your browser, on your device. It is never sent to us, because there is nowhere to send it, Clearform has no server and no database. Wipe it from the app in two taps whenever you like, and if you ever want certainty, regenerate the key in intervals.icu and the old one stops working everywhere.
Only what you ask it to. Moving, editing or deleting a session, and marking yourself sick, injured or away, all write back to your calendar. Clearform never recalculates your training load and never rewrites your workout structure, intervals.icu works those out on its own.
No. intervals.icu connects to more than 250 apps, platforms and devices, and Clearform reads whatever arrives. HRV, resting heart rate and sleep come from whichever wellness source you have linked, Garmin, Polar, Coros, Suunto, Oura, Whoop, and many others. Clearform tells you which one it read.
One athlete in Bavaria. I love intervals.icu and could not find a companion that simply told me how I was doing, so I spent a lot of evenings and a lot of coffee building the one I wanted. It is free and nothing is gated, no ads and no subscription. Every feature gets used in real training before it ships.
Free forever, on iPhone and Android. All you need is a free intervals.icu account.
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