Contact support
Email business@asteratek.com with the app name, your device type, app version and a short description of the problem. For a question correction, include the question ID shown in the app. Do not send payment-card details or passwords.
Purchases and progress
Use Restore Purchases in the app to recover an eligible purchase made with the same store account. Payment and refund requests are handled by Google Play or Apple. To move your study records, use the app’s backup export and import controls; keep the exported file private.