ルナベル服薬日記 is an app designed for individuals who take the medication LunaBell LD or LunaBell ULD. It allows users to easily record their medication intake and track their overall health and symptoms. In addition to recording LunaBell medication, users can also record other daily medications such as pain relievers and supplements, making it easy to review and reflect on their medication history. The recorded data can be attached to emails, making it useful for medical consultations. Users can also decorate their own Luna-chan's room with items received as rewards for recording their medication.

The main features of LunaBell服薬日記 include medication check and recording, medication and rest notification alarms, a Q&A section about LunaBell medication, a daily health and symptom recording with a mini diary function, a function to view recorded data in a list format, a schedule function to write down appointments, and a PDF conversion function to send data via email to a computer or other devices. The app also provides information about the menstrual cycle, the causes of menstrual pain, and treatment options.

With LunaBell服薬日記, users can find answers to their concerns about LunaBell medication and learn how to handle situations such as forgetting to take their medication. The app offers an easy initial setup process by setting the medication start date and alarm time. Recording medication intake, symptoms, and overall health is simple and smooth, with the option to leave a 70-character mini diary entry. Users can view their recorded information by clicking the "List" button.