Sylvia House Support

Contact: jason.feng126@gmail.com.

Math chapters 1 and 2 are free. One optional purchase unlocks the remaining published math chapters. There are no subscriptions or ads.

For purchase help, open Parents or Learning report, complete the grown-up confirmation, choose Unlock / restore chapters and then Restore purchases. Use the Apple account that made the purchase. Check your connection if the product cannot load. Apple manages payment and refund requests.

For local learning records, open Learning report and choose Export records before removing app data. Version 1.0 stores records locally. Version 1.1 adds optional parent Apple/Google sign-in and family cloud storage. Your on-device trial and cloud family stay separate; old records are not automatically uploaded. Manage sign-in, linking and account deletion under Family account after the grown-up confirmation. Exports may contain learner nicknames and learning information. Avoid sending a child's exported records with a support request unless necessary and agreed with the grown-up.

Microphone recording is optional and local. If permission is denied, continue without recording; manage permission in system settings. The native app requires iOS 17 or later. Include the app version, device model and a description of the problem when requesting help. Do not send Apple passwords, verification codes or card details.