Terveyskylä Päiväkirja is a mobile application that is connected to Terveyskylä's Omapolku. It is designed to provide information to healthcare professionals on symptoms or monitored values up to several times a day. The application requires registration with Omapolku to be used.

The diary application is intended for data entry and transfer only and does not include calculations, graphics, or alarms. Treatment is monitored on a digital treatment path under the supervision of a professional. The diaries in the application can be related to self-care programs on Omapolku, in which case the diary information is only visible to the user.