Privacy policy

Last updated: 2 November 2026

Ottli is a language course app for iPhone and Android, made by Lino van Mulken ("we"). This policy explains what happens to your data when you use Ottli, visit this website or email us.

The short version

Ottli does not collect, send or sell any personal data. Everything you do in the app stays on your phone. If you email us or sign up as a tester, we use what you send us only to answer you and to invite you to the test.

What Ottli stores on your phone

To run the course, Ottli keeps these on your device only:

• the language you learn and the language you speak;
• your progress: which phrases you have heard, when, and when they are due again;
• your settings, such as the card direction and Manual or Auto mode;
• your daily goal and streak.

This data is not sent to us or to anyone else. It is removed when you delete the app. Your phone's own backup (iCloud or Google) may include it, under Apple's or Google's privacy terms.

What Ottli does not do

• No account or sign-in.
• No analytics, advertising or tracking, and no third-party software that does these.
• No access to your location, contacts, photos or microphone.

In the car

With CarPlay, Android Auto or a Bluetooth car, Ottli plays its audio through your car. Your car and your phone's car software (from Apple or Google) handle that connection; Ottli does not receive information about your car or your driving. If you start Ottli with Siri or Google Assistant, the voice request is handled by Apple or Google, and Ottli only receives the request itself, such as the language to play.

Purchases

When paid content becomes available, purchases go through the App Store or Google Play. Apple or Google handle the payment; we never see your payment details, only whether a purchase is active.

When you email us or sign up as a tester

If you email us, we receive your email address, your name if your email shows it, and what you write. If you sign up as a tester, you also send us the Google account on your phone and, if you like, your car and the language you want to learn.

We use this only because you asked us to: to answer you and, for testers, to invite you to the test of Ottli. For the invitation we add your Google account to the test list in Google Play Console, Google's service for app developers; Google then handles the invitation under its own privacy terms. We don't use your details for anything else and don't share them with anyone else. Email to support@ottli.app is forwarded to our mailbox by Cloudflare.

We keep emails as long as we need them to help you, and tester details until the test has ended; then we delete them. You can ask us to delete them earlier at any time.

This website

ottli.app uses no cookies, no analytics and no tracking, and loads nothing from other websites. It is hosted by Cloudflare, which processes technical data such as your IP address to deliver the pages and to protect the site against abuse.

Children

Ottli is suitable for all ages and does not knowingly collect data from anyone, including children.

Your rights

The app holds no personal data about you that we can see: deleting the app removes everything Ottli stored. If you have emailed us or signed up as a tester, you can ask us at any time to show, correct or delete what we have. If you have a question about privacy or about your rights under the GDPR, contact us at support@ottli.app. You can also complain to your data protection authority (in the Netherlands, the Autoriteit Persoonsgegevens).

Changes

If Ottli starts handling personal data, for example to sync your progress between devices, we will update this policy before that version is released and change the date at the top.

Contact

Lino van Mulken, the Netherlands
support@ottli.app