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1. Summary#
You don’t need an account to use Takviye.
- Your health data never leaves your device. The supplements you add, your dose history, lab results and reminders are stored only on your iPhone. We cannot see this data and we never receive it.
- No ad networks, no tracking, no behavioural analytics.
- Only your purchase information is processed — by Apple and by our subscription infrastructure provider, Adapty — so that your subscription works.
The sections below explain this in detail.
2. Data controller and contact#
| Data controller | Tarık Aydın |
| Contact | bilgi@tarikaydin.com |
Write to this address with any privacy question, request or complaint.
3. Data we process#
3.1. Data that stays on your device (we never receive it)#
Stored in your iPhone’s protected app storage (SwiftData). Not uploaded, not backed up to us, not accessible by us.
| Data | Example |
|---|---|
| Supplement and medication details | Name, dose, unit, form, times, relation to meals |
| Dose history | Which dose you took or skipped, and when |
| Stock | Doses remaining in the box |
| Lab results | Blood values you enter, measurement date, notes |
| Preferences | Name (optional), language, app settings |
This may constitute special category (health) data. That is precisely why the app is built so that we never collect it.
Reminders are scheduled locally through iOS notifications; notification content never passes through any server.
3.2. Purchase data (processed by third parties)#
If you buy or restore a Takviye Pro subscription:
| Recipient | Data processed | Purpose |
|---|---|---|
| Apple | Your Apple Account, payment details, transaction record | Taking payment, managing the subscription |
| Adapty | Purchase history, device identifier, app and OS version, country/region, IP address | Verifying subscription status, restoring purchases, subscription analytics |
We never see or store your payment details (card numbers, etc.); payment is handled entirely by Apple.
Adapty does not use this data for advertising or tracking; it processes it only so the app functions. Adapty’s privacy policy: https://adapty.io/privacy
3.3. Data we do not collect#
- Location
- Contacts, photos, microphone, camera
- Advertising identifier (IDFA) — we use no ad networks
- Cross-app or cross-site tracking data
- Any copy of your health data
The app is not integrated with Apple Health (HealthKit) and does not read health data from it.
4. Purposes and legal bases#
| Purpose | Legal basis (GDPR) | Legal basis (KVKK, Türkiye) |
|---|---|---|
| Scheduling reminders, tracking doses and stock | Art. 6(1)(b) — contract | Art. 5/2-c — performance of a contract |
| Calculating the blood level estimate | Art. 9(2)(a) — explicit consent (you enable the feature in-app) | Explicit consent |
| Purchasing and verifying a subscription | Art. 6(1)(b) — contract | Art. 5/2-c — performance of a contract |
| Preventing misuse, fixing technical faults | Art. 6(1)(f) — legitimate interests | Art. 5/2-f — legitimate interests |
Because health data never leaves your device, we carry out no processing operations on it.
5. International transfers#
Your health data is not transferred internationally — because it is never transferred at all.
Purchase data may be processed in the countries where our service providers operate (Apple and Adapty — United States and European Union). This transfer is necessary for the subscription to work and relies on standard contractual clauses and the providers’ own commitments under GDPR Chapter V and KVKK Art. 9.
6. Retention#
- On-device data: kept until you delete it or remove the app. You can erase everything at any time via Profile ▸ Data ▸ Delete all data. Deleting the app also removes all data.
- Purchase data: retained by Apple and Adapty under their own policies and for as long as legal obligations (e.g. accounting) require.
7. Security#
- Because health data never leaves the device, there is structurally no server-breach risk for it.
- Data is held inside the iOS app sandbox and is encrypted by iOS file protection when a device passcode or Face ID is set.
- If iCloud Backup is enabled on your device, app data may be included in Apple’s backups. You can turn this off in device settings.
Keeping your device physically secure (screen lock, passcode) is your responsibility.
8. Children#
Takviye is not directed at children under 13 and does not knowingly collect their data. We recommend that people under 18 use it only with parental supervision.
9. Your rights#
Under GDPR and KVKK you have the right to:
- Be informed about the data processed about you
- Access, rectify and erase your data
- Restrict processing
- Data portability
- Withdraw consent where processing is based on it
- Object to processing
- Seek compensation for damage suffered
Important: because we do not hold your health data, we cannot technically fulfil access or erasure requests for it — you can delete it yourself, instantly and completely, from within the app. For requests about purchase data, write to bilgi@tarikaydin.com; we will respond within 30 days at the latest.
You also have the right to lodge a complaint with your supervisory authority (in Türkiye, the Personal Data Protection Authority — KVKK).
10. Note on health information#
Takviye is not a medical device. The blood level estimates it shows are mathematical calculations based on average absorption rates; they do not constitute diagnosis, treatment or medical advice and are not a substitute for a real laboratory result. See the Terms of Use for details.
11. Changes#
If we change this policy we will publish the updated text on this page and change the “last updated” date. For material changes we will notify you inside the app.