The Sign-in by Email option is intended for users with an online, browser-based subscription purchased outside the App Store. When you log in, the app can verify your purchase and display your subscription details.
If you experience any issues signing in, ensure you are using the email address associated with your online purchase. Even minor typos can prevent the app from recognizing your subscription.
If you purchased subscription through the App Store, you already have access to all premium features, so email sign-in is not necessary. Both in-app and online subscriptions provide the same benefits.
✍️ Note: The app does not include an account creation feature, which means all your data and progress are stored locally on your device's iCloud and is never transferred to our servers for privacy reasons.