Coach · as of 1 October 2026

Privacy notice

This notice has two parts: Coach, for athletes who joined by Invite, and the waiting list, for people waiting for a spot.

Who is responsible

Marco Schache (a private person), marco@pollystudios.com.

Coach, for athletes

Coach is a cycling coach for a few people the Owner invites. It reads your training from intervals.icu, plans it, writes the workouts back and keeps your food and recovery beside it. It is not offered to the public.

What is used, and why

• From your intervals.icu, with the access you grant when you sign in (reading activities, writing wellness, the calendar and sport settings): your rides with their power, heart rate, cadence and route, your wellness (weight, body fat, sleep, HRV, resting heart rate, mood, fatigue, soreness and stress), your planned workouts and your sport settings (FTP, LTHR and zones). Once, when you join: your name, birthdate, sex, height, weight and time zone. Rides that reach intervals.icu from Strava are never read: Strava does not allow its data to be used by an AI.
• Written to your intervals.icu: planned workouts, what you log (wellness and the food you confirm), the type of an activity that is not a ride (a walk), your FTP when you accept a change to it, and a short summary in a ride's description if you switch Ride notes on.
• Kept on the server: the form you fill in when you join, the profile the Coach writes about you, your Settings, your Conversation with the Coach and the photos you send it, your meals, the Coach's Proposals and ride reports, your Devices and their push subscriptions, your work calendar's link if you give one (only the busy times are read from it, never what a meeting is), your AI key, sealed, and what the Coach used of it.
• Counted: when the Owner tries two versions of a screen (an Experiment), a screen opened or a card tapped, by name only, never a number about your body, training or food. Settings lists each Experiment you are in, and you can leave any of them.

Your weight, heart rate, sleep, food and how you feel are health data. They are used only to coach you, and only with your explicit consent (Art. 9(2)(a) and Art. 6(1)(a) GDPR), which you give with the checkbox before Join. The rest is used to provide the coaching you asked for (Art. 6(1)(b) GDPR). You can withdraw your consent at any time by leaving (below). Withdrawing does not affect anything done before.

The Coach is an AI. Its plans and Proposals change only what you approve, or what applies itself at a Deadline you can always answer before; it never decides anything about you beyond your training and food.

Where it goes, and who processes it

• The server is hosted by Hetzner Online GmbH, in Germany. A backup is made every night on the same server, and each is kept for 14 nights.
• intervals.icu keeps your training, wellness and plan in your own account, under its own terms and privacy policy. Coach reaches it only with the access you grant, which you can end there at any time.
• Your AI Provider: what you send the Coach, and what the Coach reads to answer it (which can include your health data), goes to the Provider whose key you add in Settings: Anthropic, OpenAI, Google, or an endpoint you name. You choose it, you pay it, and it processes your data under the terms you accepted with it; it may process data outside the EU, for example in the USA.
• Without your name, from the server: the coordinates of where you ride to Open-Meteo (the weather) and the place you name when you join to its geocoder; a barcode or a food's name to Open Food Facts and the USDA's FoodData Central; and the squares of a ride's map to CARTO. The phone never asks them itself.
• Push messages go through your browser's push service (Apple, Google or Mozilla), encrypted, so that service can deliver them but not read them.
• When you correct a rule every athlete is coached by, the Coach files it as an issue in the Owner's GitHub repository (GitHub, Inc., USA): the rule and the change, never your health data or who you are.

The Owner runs the server. They do not look at your data, but they could technically read it: whoever runs a server can. Nobody else receives it. It is never sold, never used for advertising, and never used to train an AI by Coach.

How long it is kept

Until you leave, or the Owner removes you. Experiment counts go after 180 days.

Leaving, and your rights

Leave in Settings whenever you want: you download your Conversation and Meals first, then everything the server holds about you is deleted and Coach's access to your intervals.icu ends. Copies in the nightly backups are gone 14 nights later. What Coach wrote to your intervals.icu stays there, yours to keep or delete. Delete your key at your AI Provider yourself.

You can also ask for access to your data (Art. 15 GDPR), for it to be corrected (Art. 16) or deleted (Art. 17), for its processing to be restricted (Art. 18), and for a copy to take elsewhere (Art. 20), and you can object (Art. 21). Write to marco@pollystudios.com. You can also complain to a data protection supervisory authority, for example the one where you live.

In the app

Cookies only to sign you in and keep your Device signed in. Your browser's local storage keeps a few choices of yours on the Device, such as light or dark. No analytics and no advertising. Fonts, scripts and map tiles come from the server itself.

The waiting list

What is kept, and why

When you put yourself on the waiting list:

• your email address, which is required: to email you once when a spot opens;
• if you give them: your first name, what you would use Coach for, what you ride with, whether you use intervals.icu, the link to your Strava profile, your hours a week on the bike, where you ride and your note: to see whether Coach fits how you ride before a spot is offered to you;
• the page's language, which of its “Save me a spot” buttons you used, and when you signed up.

The legal basis is your consent (Art. 6(1)(a) GDPR), which you give with the checkbox in the form. You can withdraw it at any time by email. Withdrawing does not affect anything done before.

So that the form cannot be flooded, the server keeps your IP address for 10 minutes and then deletes it (a legitimate interest in running the service safely, Art. 6(1)(f) GDPR). It is never kept with your signup.

Where it is kept, and who processes it

• This website and its server are hosted by Hetzner Online GmbH, in Germany.
• Your signup is kept in a private Google Sheet, provided by Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland. Google may also process data in the USA; Google LLC is certified under the EU-US Data Privacy Framework.
• If Google cannot be reached, your signup waits on the server in Germany until it can be sent.

Nobody else receives your data. It is never sold, and never used for advertising.

How long it is kept

Until you ask for it to be deleted, and at the latest until the waiting list closes.

Your rights

You can ask for access to your data (Art. 15 GDPR), for it to be corrected (Art. 16) or deleted (Art. 17), for its processing to be restricted (Art. 18), and for a copy to take elsewhere (Art. 20), and you can object (Art. 21). Write to marco@pollystudios.com. You can also complain to a data protection supervisory authority, for example the one where you live.

On the landing page and this notice

No cookies, no analytics, and no fonts or scripts from other websites. If you switch the language, your browser remembers that choice (in its local storage) and nothing else.

Giving your data is voluntary: the email address is all the waiting list needs. No decisions about you are made automatically.