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.
Track and collect stamps to exchange for products or services. Use available coupons directly. View store menus and services. Make reservations and check appointment status. Receive notifications for promotions and new offers.
The app displays the Sankei Shimbun newspaper in its original layout with high-definition images. Users can access 90 days of back issues and save clipped articles to a scrapbook.
![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)
