Curél肌手帳 is a skin diary app designed for people with dry and sensitive skin. It allows users to record their skin condition, sleep, stress, menstrual cycle, and skincare routine, enabling them to track their skin's tendencies with graphs. Moreover, users can simultaneously check the correlation between their skin condition and lifestyle changes.

One of the app's main features is its simple diary creation. Users can easily record their daily routines by tapping on icons for skin condition, sleep, stress, menstrual cycle, and skincare routine. They can choose which items to record, and weather information is automatically added to the diary. The app's skin graph provides a clear overview of the user's skin condition and its correlation with lifestyle changes, while the skincare-focused weather forecast shows information on skin irritation, UV, and humidity. In the product information section, users can access the latest information and useful tips on skincare from Curél.