Privacy Policy
Effective date: 12 November 2026
In short
- We collect what Tanren needs to build your plan and keep your training in sync. We don't sell your data, show ads or track you across apps and websites.
- Injuries and limitations, and weights copied from Apple Health, are stored only with your explicit consent. You can withdraw it at any time.
- For the camera form check, the video is analyzed on your device. It is never saved and never leaves the device.
- Your account data is stored in the EU (Frankfurt, Germany). You can export it or delete your account in the app.
1. Who we are
Tanren is made by Lokman Çelik, an independent developer. He is the data controller (the "veri sorumlusu" under Türkiye's KVKK) for the personal data described here. Contact: lkmcelik@hotmail.com.
This policy covers the Tanren apps for iPhone, iPad and Apple Watch, and this website.
2. What we collect and why
| Data | What it includes | Why we use it |
|---|---|---|
| Account | Your email address, how you sign in (Apple, Google, or email and password) and the account identifiers from Apple or Google. With Sign in with Apple, Tanren asks only for your email address, which can be a private relay address. With Google, Google also passes your name and profile picture link, which our sign-in service stores with the account; Tanren doesn't use them. Passwords are stored only as a secure hash. | To create your account, sign you in, send sign-up confirmation and password reset emails, and keep your data in sync between your devices. |
| Profile and body | Sex, birth year, height, weight, target weight, skin tone, muscle density, avatar body, unit system and language; the weights you log; optional measurements (waist, neck, hips). | To shape your avatar, build your plan and estimate metrics such as BMI and body fat. |
| Training preferences | Goals, disciplines, experience and self-assessment, training days and session length, where you train and your equipment. | To build and adapt your plan. |
| Injuries and limitations (optional) | The body areas you want your plan to protect. This is health data. It is stored only after you give your explicit consent on a separate screen. | To leave out exercises that conflict with them. |
| Training | Plans, workouts and sets (reps, load, time, effort), personal records, skill progress, favorites, exercises you create, and streak pauses and repairs. With the form check, the rep count or hold time and the form score. | To run your workouts, adapt your plan and show your progress. |
| Consent records | Each time you give or withdraw a consent: which consent, the version of the text you saw, its language and the time. | To show that we have your consent. |
| Subscription | The plan, its status, renewal and expiry dates, and Apple's transaction identifiers. We never see your payment details. | To unlock Tanren for your account, and to stop a refunded subscription from being used again. |
| Technical data | Request and security logs of our backend (such as IP address, time and the account involved) and counters that limit requests per hour. | To keep the service secure and working. |
| Diagnostics | Crash, hang and performance reports from Apple's MetricKit. They contain no workout content and are stored without your account id. | To find and fix problems. |
We also use account and training data in aggregate, as counts per day or week and never about one person, to understand how Tanren is used and to improve it.
3. Apple Health
Tanren connects to Apple Health only with the permission you give when iOS asks. Tanren can:
- On iPhone: save your finished workouts, read and save your body weight, and read active energy.
- On Apple Watch: save a workout the watch recorded, and read heart rate and active energy during a workout to show them.
Heart rate, active energy and workout statistics never leave your devices. Tanren doesn't store your heart rate.
Weights from Apple Health are copied to your Tanren account only if you agree to it separately in Settings › Apple Health. If you disconnect, Tanren deletes the copied weights from your device and from our servers.
Data from Apple Health is never used for advertising or marketing and is never sold or shared with third parties.
What Tanren saved to Apple Health stays in the Health app after you sign out or delete your account. You can delete it in the Health app.
4. Camera form check (beta)
If the form check is available to you, Tanren uses the front camera to count your reps and check your form. The video is analyzed on your device while it is captured. It is never recorded, never saved and never sent anywhere. Only the rep count (or hold time) and the form score are saved with your set.
Tanren uses the camera only after you allow it. You can turn camera access off in the iOS Settings app at any time.
5. Notifications
Rest-timer alerts and the reminders you turn on are scheduled on your device. We don't use a push service, and we don't store a notification token.
6. Legal bases
Under the EU and UK GDPR and Türkiye's KVKK, we process your data on these grounds:
- To provide the service you signed up for (GDPR Art. 6(1)(b); KVKK Art. 5(2)(c)): your account, profile, preferences, training data and subscription.
- Your explicit consent (GDPR Art. 6(1)(a) and 9(2)(a); KVKK Art. 6): injuries and limitations, and weights copied from Apple Health. You can withdraw it at any time in the app. Withdrawing doesn't affect processing that happened before.
- Our legitimate interests (GDPR Art. 6(1)(f); KVKK Art. 5(2)(f)): security logs and request limits, aggregate statistics, diagnostics, and records that stop a refunded subscription from being reused.
- Legal obligations (GDPR Art. 6(1)(c); KVKK Art. 5(2)(ç)): when the law requires us to keep or disclose data.
7. Who processes your data
| Company | What it does for Tanren |
|---|---|
| Supabase, Inc. | Database, sign-in, sign-in emails, storage of the exercise animations and our server functions. Your account data is stored in Supabase's EU region in Frankfurt, Germany. |
| Apple | App Store purchases and subscriptions, Sign in with Apple, Apple Health on your device and the delivery of diagnostic reports. To link a purchase to your account, Tanren gives Apple a random account identifier, never your name or email. Apple's own privacy policy applies to its services. |
| Google Sign-In, only if you choose it. Google's own privacy policy applies. | |
| GitHub | Hosts this website. |
We don't sell or rent your data, and we don't share it with advertisers or data brokers. Apple, Google and GitHub may process data outside your country under their own policies.
8. No ads, no tracking
Tanren has no advertising and no third-party analytics, attribution or crash-reporting tools. It doesn't use your device's advertising identifier and doesn't track you across apps and websites. This website uses no cookies and no analytics.
9. How long we keep data
- Account, profile and training data: until you delete your account.
- Injuries and limitations: until you withdraw your consent or delete your account. Plans made before a withdrawal stay in your plan history until you delete your account, and the exercises they contain may reflect the limitations you had.
- Weights copied from Apple Health: until you disconnect Apple Health or delete your account.
- Consent records: as long as your account exists.
- App Store notification log: 90 days.
- Subscription state after you delete your account: the last state of each of your subscriptions (Apple's transaction identifiers, the product, the status and its dates) is kept without your account id or any token for 90 days; a refunded or revoked subscription until 90 days after its access ended. This stops a refund from being undone with an old purchase record.
- Request counters: hourly; deleted with your account at the latest.
- Security logs and diagnostics: only as long as needed for security and to fix problems.
- On your devices: until you sign out or delete the app. A data export file is deleted from your device when you finish sharing it.
10. Deleting your account
You can delete your account in the app: Profile › Settings › Delete account. If you haven't subscribed, use the Account button on the subscription screen. This deletes your data from our servers and from your device, and for Sign in with Apple it revokes Tanren's access to your Apple Account. It doesn't cancel your App Store subscription. What is deleted and what stays.
11. Your rights
You have the right to access your data, correct it, delete it, restrict or object to its processing, receive it in a portable format and withdraw your consent. Under KVKK Article 11 you can also ask whether your data is processed, for what purpose, and to whom it is transferred, and claim compensation for unlawful processing.
- Export: Profile › Settings › Privacy & data › Export my data gives you a copy of your account as one JSON file.
- Correct: edit your data in Profile.
- Withdraw consent: Profile › Settings › Privacy & data › Health-data consent, or Apple Health › Disconnect.
- Delete: see section 10.
For anything else, write to lkmcelik@hotmail.com. We reply within 30 days. You can also complain to a data protection authority: in the EU, the one where you live or work; in Türkiye, the Personal Data Protection Authority (KVKK).
12. Security
Data is encrypted in transit and at rest. Every account can read and change only its own data, and the keys that can reach all data exist only on our servers, never in the app. On your device, Tanren uses iOS data protection.
13. Adults only
Tanren is for adults aged 18 and older. Setup accepts adult birth years only. If we learn that an account belongs to someone under 18, we delete it.
14. Changes to this policy
When we change this policy, we update this page and its effective date. If a change is significant, we tell you in the app before it takes effect.
15. Contact
Lokman Çelik · lkmcelik@hotmail.com