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How do I cancel my Coursium subscription?

Subscriptions are billed by Apple or Google, not by us, so cancelling happens in your store account settings — App Store → your name → Subscriptions, or Play Store → Payments and subscriptions. Cancel at least 24 hours before the period ends to avoid the next renewal. Access continues until the end of the period you already paid for, and deleting the app does not cancel anything.

Can I get a refund for Coursium?

Refunds are handled by the store that took the payment, because we never receive the charge ourselves. On iOS use reportaproblem.apple.com; on Android use the refund process in Google Play. If you have a statutory right to a refund where you live, email us and we will honour it.

I paid but the app says I am not subscribed.

Open Profile → Settings → Subscription and tap Restore purchases. That re-checks your store account and reinstates access. If it still does not appear, make sure you are signed into the same Apple or Google account you bought with, then email us and we will look it up.

Does my Coursium progress sync between devices?

Yes, once you sign in. Progress is stored on your device first and syncs to your account, so lessons work offline and catch up when you reconnect. Without an account, progress stays on that one device and is lost if you delete the app.

Which devices does Coursium run on?

iPhone and Android. There is no web version — lessons are built for a phone, and they work offline, so a tunnel or a flight is a fine place to finish one.

How do I earn a Coursium certificate?

Finish every lesson in a course to earn that course certificate, and every course in a program to earn the program certificate. You choose the name that goes on it, and it carries a twelve-letter reference anyone can check at coursium.ai/verify. You need to be signed in, so the certificate can be issued against your synced progress. It records that you did the work; it is not an accredited qualification.

Who can see my Coursium certificate?

Anyone you give the link or the reference code to — that is the point of it. The page shows your name, the course, the date and the issuer. Certificate pages are not indexed by search engines and the codes cannot be listed or guessed, so nobody finds yours by browsing. Email us if you want a certificate withdrawn and its page will stop resolving.

Can I change the app language?

Profile → Settings → Language. English, German, French, Spanish, Japanese and Korean are supported, and the setting changes both the interface and the course content.

How do I turn the daily reminder off?

Profile → Settings → Notifications is a switch. There is only ever one reminder a day, at the time you picked when you started, and your phone’s own notification settings override the switch either way.

What data does Coursium collect?

Your course progress, your preferences, your subscription status, and — if you sign in — your email address, plus analytics events recording which screens and lessons you use. No contacts, no location, no photos, no advertising trackers, and nothing is sold. The privacy policy at coursium.ai/privacy names every company that processes any of it.

How do I delete my Coursium account?

Profile → Settings → Delete account removes your account and everything attached to it. Deletion is permanent and cannot be undone. If the app says the account could not be reached, your device data is already gone — email us and we will finish removing the server side.

A lesson will not load or the app crashed.

Close the app fully and reopen it first; lessons are cached on the device and a fresh start clears most of it. If it happens again, email us with your device model, your operating system version, the app version from the bottom of the Settings screen, and the lesson you were on.

Looking for the legal pages? They are at privacy and terms.