MyDarling is an Android application developed by TenthBit Inc. and falls under the Social & Communication category. It is a free app that provides couples and close friends with a platform to manage important dates and communication with each other. With MyDarling's widget, you can easily manage your loved one's birthday and anniversary dates, view the history of your communication, and check the diary written by your partner.

The app also features a unique widget character that changes its expression based on the time you receive a message or Love Rhythm. The app provides a wide range of features such as checking major D-days like 100, 500, and 1000 days, as well as anniversaries for lovers like Valentine's Day and White Day. You can also record precious memories in a diary and check your partner's Love Rhythm by date. The app also allows you to register other major schedules, and perform backup and restore operations through cloud service.

Overall, MyDarling is a great app for couples and close friends who want to stay connected and manage their important dates and communication with ease.