Need help? Email [email protected] with your app version, device model, and a description of the issue. FAQ • The first launch needs internet to download lessons; after that the app works offline. • Progress stays on your device; deleting the app clears it. • If content does not update, check your connection and reopen the app. • If you are a tester and need advanced units, copy your installation ID from Settings → Installation ID and send it to us.