The Paro-ComPas app serves users as a digital companion during periodontal therapy over a period of approximately one year. The app is intended for adult users and offers various input options as well as the display of (medical) data for the sole information of the user. The functions include:- Keeping a personal oral hygiene diary- Presentation of clinical parameters collected by a dentist- Knowledge library with specific dental health information- Recording and remembering appointment(s) as part of periodontal therapy- Reminder to keep personal oral hygiene diaryThe app is used as part of the “Paro-ComPas” project. After installing the Paro-ComPas app, an onboarding (setup) is carried out by a dentist participating in the “Paro-ComPas” project.