Contents
1. Who we are
Tristyle (the "App") is a private, members-only training application for an amateur triathlon and swimming club. The App is developed and operated by Siltek LLP, a Limited Liability Partnership registered in the Republic of Kazakhstan ("we", "us", "our"). Siltek LLP is the data controller responsible for your personal data processed through the App.
2. Scope
This Policy applies to personal data we process when a club member uses the Tristyle mobile app and connected services. The App is free for club members, has no public sign-up, and is not used to sell advertising or personal data.
3. Data we collect
We collect only what is needed to run the App for you and your coach:
- Account information — your name and a club/messenger identifier used to sign you in, and your club/group membership.
- Training data — workouts and their metrics (duration, distance, pace, speed, power, heart rate, GPS track, laps), imported from your connected sports watch or fitness account, or entered by your coach.
- Wellness data — where available from your device: sleep, heart-rate variability (HRV), stress and energy levels.
- Self-entered data — optional metrics (e.g. weight, thresholds), training notes, nutrition entries and a daily journal.
- Technical data — basic app and device information and a push-notification token, used to deliver notifications and keep the App working.
4. Connected devices & fitness services
If you choose to connect a sports watch or fitness service, we access your activity and wellness data through the provider's official API to bring your workouts into the App automatically.
Consent-based. We access this data only after you grant permission through the provider's own secure sign-in (OAuth 2.0). We never see or store your device-account password.
- We request only the data needed to display your training and wellness in the App — activity details (including GPS, heart rate and power where recorded) and wellness summaries (sleep, HRV, stress, energy levels).
- This data is used solely to display your own information back to you and to your coach within your club. It is not sold, rented, or shared with advertisers or unrelated third parties.
- You can disconnect a device at any time from within the App or from your device account. On disconnection we stop receiving new data, and you may request deletion of previously imported data (see "Your rights").
5. Apple Health & Health Connect
On iOS and Android, and only with your explicit permission, the App may read selected fitness and health metrics from Apple Health or Android Health Connect (for example workouts, steps, resting heart rate, sleep) to enrich your dashboard. This data stays associated with your account and is used the same way as described in this Policy. You can revoke access at any time in your device settings.
6. How we use data
- To show your training schedule, workouts, analytics, wellness and progress inside the App.
- To let your coach view your training and attendance and provide feedback.
- To send you relevant notifications (for example, achievements or coach messages).
- To operate, maintain, secure and improve the App.
We do not use your data for advertising, and we do not sell it.
7. Legal basis
Where applicable law requires a legal basis, we rely primarily on your consent (which you can withdraw at any time) and on our legitimate interest in operating a members-only training app for your club. Connecting a device, Apple Health or Health Connect is always optional and consent-based.
8. Sharing & disclosure
- Your coach and club — the coach responsible for your group can see your training and attendance, so they can guide you. Other members do not see your private health data.
- Service providers — we use trusted infrastructure providers (hosting, push-notification delivery) that process data on our behalf under appropriate safeguards.
- No sale, no ads — we never sell personal data and do not share it with advertisers or unrelated third parties.
- Legal — we may disclose data if required by law or to protect our rights and users' safety.
9. Data retention
We keep your data while your account is active and you remain a club member. When you leave the club, ask us to delete your data, or after a period of inactivity, we delete or anonymize your personal data, unless we must keep certain records to meet legal obligations.
10. Security
We protect your data with encryption in transit, access controls, and restricted administrative access. No system is perfectly secure, but we take reasonable technical and organizational measures appropriate to the sensitivity of health and fitness data.
11. Your rights & choices
- Access — request a copy of the personal data we hold about you.
- Correction — ask us to correct inaccurate data.
- Deletion — ask us to delete your account and personal data.
- Disconnect & revoke — unlink any device, Apple Health or Health Connect at any time; new data stops flowing immediately.
- Withdraw consent — where processing is based on consent, you can withdraw it at any time.
To exercise any of these rights, contact us through the App or using the details in the "Data controller" section below. We respond within a reasonable timeframe.
12. International data transfers
Your data may be processed on servers located in different countries. Where data is transferred across borders, we take steps to ensure it remains protected in line with this Policy.
13. Children
The App is intended for club members aged 16 and over. We do not knowingly collect data from children under this age without appropriate consent. If you believe a minor has provided us data without proper consent, please contact us and we will remove it.
14. Changes to this Policy
We may update this Policy from time to time. When we make material changes, we will update this page and, where appropriate, notify you in the App.
15. Data controller
The data controller responsible for your personal data is: