Support
Need help with Lumen, a question or your subscription? Let us know.
Report a problem or question error
Include your device model, operating system and app version. For a quiz issue, include the grade, chapter, question text and what seemed incorrect.
You can also open a GitHub issue for a non-sensitive bug report. Keep account details, names, photos and other personal information out of public posts. Never send passwords, sign-in codes or full payment-card details.
Daily Spark and Pro access
Daily Spark offers a free ten-question quiz without sign-in. Pro unlocks all available subjects and chapters across Grades 9–12 with one monthly subscription. Questions are bundled with the app; additions arrive through app updates.
If sign-in or subscriptions are unavailable, check the message shown in your installed build. Visit the download page for current store availability.
Restore a subscription
Connect to the internet, sign in with the Lumen account associated with the purchase, and ensure the store uses the account that paid. In Preferences, select Restore purchases. A pending payment or unverified subscription may not unlock Pro yet. Contact us if the store shows an active subscription but restoration does not recover access.
Offline access depends on verified subscription information and can require reconnection. See the Terms of Use for the seven-day verification limit and entitlement-expiry rules.
Cancel renewal
Use Manage subscription or open Apple subscriptions or Google Play subscriptions. Deleting your account, resetting, signing out or uninstalling does not cancel renewal. Refund requests follow the purchasing store’s process.
Local progress and account deletion
Your nickname, chosen photo and learning progress stay on the device. Sign-in and purchase restoration do not restore quiz history. Read Data controls before resetting or clearing storage.
For account removal, follow Delete account, including the email option if you cannot access the app. Account deletion and local reset are separate actions.
Privacy questions
Read the Privacy Policy for sign-in, subscription processing, local data and retention. Email glitchlabsio@gmail.com for private requests.