Help test Sestava before launch

Sestava is nearly ready for the App Store. Before it gets there, we would like athletes and coaches to train with it: on your own workouts, in your own gym, with your phone in your pocket. Then tell us what breaks, what confuses you and what is missing. The beta is free and runs through Apple’s TestFlight. The App Store release is planned for 17 November 2026.
What Sestava does
For athletes, Sestava runs a training plan. A big timer shows the exercise you are on and the one that comes next, a voice announces every change, even with the phone locked, and beeps count down the last three seconds. For strength sets you tap Done Set and the rest timer starts on its own. With your permission, every finished workout is saved to Apple Health.
For coaches, there is Sestava Studio, a free plan builder in the browser. You build a workout, then share it as a link or print it as a QR code, and your athletes open it in Sestava. How Studio and the QR code work.
A plan can also come from a file, or you can describe a workout in your own words and let Apple Intelligence build it on your iPhone.
What to try
- A first workout. On your iPhone, open this Tabata workout: eight rounds of 20 seconds of burpees and 10 seconds of rest. Sestava shows you the plan before you start. Run it to the end, then look at the summary and at the workout in Apple Health.
- A plan from your coach. Scan your coach’s QR code with the iPhone camera, or in Sestava: on the Plans tab tap +, then QR Code or Link → Scan Code. Coaches: build a plan in Studio and send the link to two or three of your athletes.
- The lock screen. Start a workout and lock your phone. The Live Activity shows the current step, a countdown and what comes next, with Pause and Skip buttons (Pause and Done Set on a strength set). On an iPhone with the Dynamic Island, it is there too.
- The way you train. Intervals, sets and reps, supersets, AMRAP, For Time, hangboard repeaters: run the formats you actually use. Our guide to training formats has an example plan for most of them.
- Describe a workout. If your iPhone supports Apple Intelligence and it is turned on in Settings → Siri, tap + on the Plans tab, choose Describe a workout and type a session the way you would tell a friend.
- On your wrist. If you have an Apple Watch with watchOS 27, unlock Sestava Pro on the iPhone, start a workout on the phone, and the watch follows. The watch app is part of Sestava Pro. In TestFlight, in-app purchases are free, so you can unlock Pro to try it; a purchase made in the beta does not carry over to the App Store version (TestFlight).
What is not finished yet
- Czech. The app is in English for now; its Czech translation is under way. The website is already in Czech.
- Garmin. Garmin fēnix watches, and sync with Garmin Connect and TrainingPeaks, are planned after launch.
- Bugs. It is a beta. Something will go wrong, and that is exactly what we want to hear about.
How to join
You need an iPhone with iOS 27; for the watch app, an Apple Watch with watchOS 27. The link is open to anyone, for the first 200 testers.
- Install TestFlight from the App Store.
- Open this link on your iPhone: Join the Sestava beta.
- Follow TestFlight’s steps to install Sestava.
When you join through a public link like this one, Apple does not show us your name or your email address, unless you add it to your feedback or email us. We do see how many sessions and crashes you had, the day you installed the app and the version you are on (TestFlight). Each build works for up to 90 days, and TestFlight tells you when a new one is out.
How to tell us what you found
- From the app: take a screenshot, tap the thumbnail, mark up what is wrong if you like, then tap Done and Share Beta Feedback. Add a sentence on what you did and what you expected.
- After a crash: if TestFlight asks whether to send the crash details, please say yes.
- By email: [email protected]. If a plan misbehaves, send its link; it carries the whole plan.
Feedback you send through TestFlight also goes to Apple, as part of its service. Thank you for helping.
Cover photo by Sasun Bughdaryan on Unsplash.