Last updated: July 4, 2026
Teller collects no data. There are no accounts, no analytics, no ads and no third-party SDKs. Everything you track stays on your own devices — your iPhone and Apple Watch. We couldn't look at your habits even if we wanted to, because your data never reaches us.
Teller is developed and published by an independent developer based in the Netherlands ("we", "us"). For the purposes of the EU General Data Protection Regulation (GDPR), we are the data controller for any personal data described in this policy. You can reach us at info@ddrck.com.
Your counters, goals, cues, streaks, statistics and settings are stored locally on your iPhone and Apple Watch. Teller has no servers of its own, and the app never transmits your habit data to us or to anyone else.
Teller keeps your data in sync between your iPhone and Apple Watch. This happens directly between your own devices, using Apple's device-to-device communication (WatchConnectivity) and a shared app container. This means:
Teller does not read from or write to Apple Health. Should a future version add an optional Health integration, it will only work with your explicit permission, health data will be processed on your device only and never transmitted off your device, and it will never be used for advertising, marketing or data mining, nor sold or shared. Any such change will also be reflected in this policy first.
Reminders and cues are scheduled locally on your iPhone and Apple Watch, at your request. Teller does not use push notification servers, and the content of your notifications never leaves your devices.
Teller contains no analytics, advertising or tracking SDKs of any kind. We do not use cookies, fingerprinting or identifiers.
If you have opted in to sharing analytics with app developers in iOS (Settings › Privacy & Security › Analytics & Improvements), Apple may provide us with aggregated, anonymized crash reports and App Store statistics. These are produced by Apple, contain no habit data and cannot be linked to you by us.
If you email us for support, we receive the personal data you include in your message (such as your email address and device details). We use it solely to answer your question, never for marketing, and we don't add you to any mailing list. Support emails are deleted once they are no longer needed to help you.
Under the GDPR you have the right to access, correct, delete and port your personal data, and to object to or restrict its processing. Because your habit data lives only on your devices and in your own iCloud account — and never reaches us — you exercise these rights directly:
For the limited data we do process (support emails), contact us at info@ddrck.com. You also have the right to lodge a complaint with your data protection authority. In the Netherlands this is the Autoriteit Persoonsgegevens.
For California residents (CCPA): we do not sell or share personal information. We have no personal information to sell.
Teller is not directed at children under 13 (or the equivalent minimum age in your country), and we do not knowingly collect personal data from anyone — including children. Since the app collects no data, no child's data can end up with us.
Your data stays on your devices for as long as you keep it. Deleting the app from your iPhone and Apple Watch removes all stored data. Note that your habit data may also be included in the device backups you make (for example via iCloud Backup or your computer) — those backups are yours and are governed by Apple's terms.
Your data is protected by iOS and watchOS device encryption, and data exchanged between your iPhone and Apple Watch is encrypted by Apple's communication frameworks. Because Teller has no servers and no accounts, there is no central database of user data that could be breached.
If we change this policy, the updated version will be published on this page with a new date at the top. For material changes — for example, if a future feature would ever process data differently — we will point it out in the app or in the release notes.
Questions about privacy? Email info@ddrck.com.