Last updated: 10 November 2026
Privacy policy
Kuko is a running coach: it builds a training plan, sends your sessions to your Garmin watch and adapts the plan to what you actually ran. This policy explains what data Kuko uses, why, where it is kept and what you can do about it. It applies to the Kuko web app and, later, to the Kuko iOS and Android apps.
Who is responsible
Kuko is run by Quentin Kozyra, an individual developer based in Paris, France, who is the data controller. Contact: contact@kuko.coach.
What data we use
| Data | Where it comes from | Why |
|---|---|---|
| Account: email address, first name, language | You, at sign-up | To give you access to your space and contact you about it |
| Training profile: goal race and date, available days, maximum heart rate, reference race time | You, and your Garmin data | To build your plan and your heart rate and pace zones |
| Activities: date, distance, duration, pace, heart rate, cadence, laps, workout steps, GPS track and altitude contained in the activity file (FIT) | Garmin Connect, once you connect your account | To compare each run with the plan and compute your training load |
| Health data: resting heart rate, heart rate variability (HRV) | Garmin Connect | To set your zones and detect fatigue before raising the load |
| Perceived effort and feel of each run | Your Garmin watch or the app | To lower the load when you report being tired |
| Notes, messages to the AI coach, sessions you move or change | You, and your coach if you invite one | To adapt your plan and keep a history of every change |
Heart rate, HRV and perceived effort are health data. Kuko only processes them with your explicit consent, given when you connect Garmin, and you can withdraw it at any time.
What we never do
- No advertising, no ad trackers, no sale or rental of your data.
- No sharing with anyone else, except the service providers listed below, which work on our instructions only, and the coach you choose to invite.
- Your data is not used to train AI models.
Legal basis
- Your explicit consent for health data (GDPR art. 9(2)(a)) and for connecting Garmin.
- The contract between you and Kuko for your account and the coaching service (art. 6(1)(b)).
Who processes your data
| Provider | Role | Location |
|---|---|---|
| Supabase | Database and file storage (activities, activity files, plans) | European Union |
| Fly.io or Render | Server that receives your Garmin activities and runs Kuko's analysis | European Union |
| Vercel | Hosting of the website and web app pages | Global network; no training data stored |
| Anthropic (Claude API) | AI coach: when you ask for a harder or lighter session, a summary of your recent training (weekly load, time per zone, perceived effort, completed or skipped steps) is sent to generate options. Activity files are never sent. Anthropic does not use this data to train its models. | United States, under EU Standard Contractual Clauses |
| Garmin | Source of your activities and health data, and destination of your planned workouts (your Garmin Connect calendar) | Under Garmin's own privacy policy |
| intervals.icu (optional) | Only if you link it yourself: delivers your planned workouts to Garmin | Under intervals.icu's own privacy policy |
How long we keep it
As long as your account is open. When you delete your account, your data is deleted within 30 days, including backups. If you disconnect Garmin, Kuko stops collecting new data immediately; what was already imported stays in your account until you delete it.
Your rights
You can access, correct, export (in a reusable format) or delete your data, withdraw your consent, and object to or restrict its processing. Write to contact@kuko.coach: we answer within 30 days. You can also complain to the French data protection authority, the CNIL (cnil.fr), or to the authority of your country.
Security
Data is encrypted in transit (HTTPS) and at rest. Each runner can only see their own data; a coach only sees the runners who invited them. Access to Garmin uses Garmin's official authorization: Kuko never sees your Garmin password.
Age
Kuko is for people aged 16 and over.
Not medical advice
Kuko gives training guidance, not medical advice. Stop and see a doctor if you feel pain or unwell.
Changes
If this policy changes, the date at the top changes too, and you are told in the app before any change that affects how your data is used.