Create and manage shared checklists with multiple users. Add tasks, set due dates, and mark items as complete. Customize themes with dark mode support. Access premium features without ads by linking a phone number. Backup data automatically.
Calendar allows users to customize calendars with icons and backgrounds featuring illustrations. Users can color-code events, view 3-day or 4-7 day calendars, scroll vertically to navigate dates, and tap dates to see event details.
Track shopping purchases across partnered stores to earn Rakuten points. View points balance and redemption options. Manage favorite stores for quick access. Receive push notifications for point rewards. Earn up to 20% cashback on eligible purchases.
![checka! [チェッカ] app icon](https://is1-ssl.mzstatic.com/image/thumb/Purple116/v4/c2/50/42/c250427f-4c3c-2f73-f466-6131ff29c3f6/AppIcon-0-0-1x_U007emarketing-0-7-0-85-220.png/512x512bb.jpg)
