The fastest way to reach us is email. Write in English, German or Turkish — whatever is easiest for you.
Email support
Please include your device model and iOS version if you are reporting a problem. We reply within 2 business days.
Frequently asked questions
How do I restore my purchases?
If you reinstalled the app or switched to a new iPhone, open the subscription
screen in the app and tap Restore purchases. Make sure you are signed
in to the same Apple account you originally subscribed with. If your
subscription still does not appear, email us.
How do I cancel my subscription?
Subscriptions are managed by Apple, not by us: open Settings > your
name > Subscriptions on your iPhone and select Sterna. Cancelling stops
the next renewal; you keep access until the end of the paid period.
How do I delete my account?
Directly in the app: go to the Profile section and choose Delete
account. This removes your account record and profile data immediately —
see the Privacy Policy for details. Note that deleting
your account does not cancel an active subscription; cancel it in your App
Store settings as described above.
Why does audio need an internet connection?
Term and dialogue audio streams from our servers the first time you play it, so
the first playback of a new day's content needs a connection. Once played,
audio is cached on your device.
When is Sterna available, and what about Android?
Sterna launches first on iPhone via the App Store; an Android version is in
preparation. If you want a short email when the app is live, send us a message
with the subject "Notify me" and we will let you know at launch.