The app helps users remember birthdays for family and friends. It offers sorting by zodiac, birth year, days since birth, and birthday countdowns, with support for the lunar calendar and notifications.
Connect to ListenSail devices via Bluetooth. View and adjust parameters such as volume, audio modes, and equalizer settings. Save custom configurations and switch between preset scene modes like quiet, noisy, and outdoor.
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.
![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)