Support
Questions, feedback, or something not working right in LUMO - Learn German Words or LUMO - Der Die Das? We're happy to help.
The fastest way to reach us is by email. We typically reply within 1–2 business days.
✉️ Loading email...Please include which app you're using and your device model/OS version if you're reporting a bug — it helps us fix things faster.
Want to delete your account and data but no longer have access to the app?
Delete your account →Common questions
How do I cancel my subscription?
LUMO - Learn German Words subscriptions are billed and managed through the App Store or Google Play, not by us directly. On iOS: Settings app → your name → Subscriptions → LUMO → Cancel Subscription. On Android: open the Play Store app → Profile icon → Payments & subscriptions → Subscriptions → LUMO → Cancel. Changes take effect at the end of your current billing period. LUMO - Der Die Das is currently free and does not offer subscriptions.
How do I delete my account and data?
In either app, go to Profile → Delete Account. This permanently removes your progress, streak, and saved data for that app. If you no longer have access to the app, use our account deletion form instead. Deleting your account doesn't cancel an active subscription — cancel that separately via the App Store or Google Play.
I found a bug or something looks wrong. What do I do?
Email us with a short description and, if possible, a screenshot. Please let us know which app and platform (iOS/Android) you're using — we read every message.
Can I use LUMO on multiple devices?
Yes — sign in with Apple, Google, or Email/Password in the app to sync your progress across devices. Without an account, your progress stays on that one device only.