Terms of Use
These terms explain access to Lumen, subscriptions and your responsibilities when using the app. Please read them with our Privacy Policy. Contact glitchlabsio@gmail.com if you have questions.
1. Learning with Lumen
Lumen provides quizzes for personal educational practice across Grades 9–12. It supplements teaching and study materials; it does not guarantee exam results, complete syllabus coverage or error-free questions. Check important explanations against your learning materials and report mistakes through Support.
Lumen is not directed at children under 13. If you are under the age required to agree to these terms or make purchases where you live, involve a parent or guardian and follow your account provider’s and store’s requirements. Do not misuse the service, interfere with other users’ accounts or bypass subscription checks.
2. Free Daily Spark and Lumen Pro
Daily Spark offers a free ten-question daily quiz without sign-in. Completion is tracked on your device using its local calendar. Lumen Pro is a monthly subscription unlocking every available subject and chapter across Grades 9–12. Available coverage may grow through app updates; the subscription is not a promise that every syllabus topic is already included.
Google or Apple sign-in is required before subscribing or restoring purchases. Account and subscription features must be configured and available in the installed build. A browser preview does not itself offer native store purchasing.
3. Price, payment and renewal
The app and store purchase screen show the available monthly plan and price in your store’s currency before you confirm. Apple or Google processes payment using your store account. RevenueCat verifies the subscription for Lumen.
The subscription automatically renews monthly until cancelled through the store. Review the store’s purchase confirmation for the billing date, applicable taxes and renewal conditions. Any price-change notices or consent requirements are handled through the store’s process.
4. Cancellation and restoration
Use Manage subscription in Lumen, or open Apple subscriptions or Google Play subscriptions. Cancel before the store’s renewal deadline if you do not want another billing period. Cancellation generally leaves access available until the current paid period ends, subject to the store’s subscription status.
For help, see Apple’s cancellation instructions or Google Play’s cancellation instructions. Refund requests follow the purchasing store’s process and applicable law; cancellation is not itself a refund request.
To recover an active purchase, connect to the internet, sign in to the Lumen account associated with it, use the store account that made the purchase, and select Restore purchases. Restoration depends on the store and RevenueCat verifying an eligible subscription. It does not restore local quiz history, and it does not guarantee transfer between different accounts or stores.
5. Bundled questions and offline access
Questions are included with the app, with additions delivered through app updates. There is no separate question-pack download. Daily Spark can use bundled questions offline.
Offline Pro access requires previously verified subscription information. Access is limited to the earlier of seven days since the last verified subscription information or the subscription’s access end, including an applicable store grace period reflected in that information. You may need to reconnect sooner if valid information is unavailable, you sign out or change accounts, or the app cannot verify access.
Offline access is not guaranteed to continue uninterrupted. Reconnect to refresh subscription status. Expiry, refund or revocation can remove Pro access after verification; your local learning progress remains unless you reset or remove it.
6. Accounts and local data
Keep your sign-in account secure. Nickname, chosen photo and learning progress are stored locally; signing in does not provide cross-device progress sync. See Data controls before clearing storage or reinstalling.
Deleting your Lumen account, resetting the app, signing out or uninstalling does not cancel subscription renewal. Cancel separately with Apple or Google. Account deletion removes the Firebase sign-in; local progress requires a separate reset. See Delete account for instructions and help if you cannot sign in.
7. Support and changes
For access, billing or question issues, email glitchlabsio@gmail.com. Include the app version and device details, but never passwords, sign-in codes or full payment-card details.
We may update these terms as Lumen changes and will update the effective date on this page. Store terms also apply to purchases. Nothing here removes rights you have under applicable consumer law.