Atreon is a game-changing digital biomarker for arthritis (Rheumatoid Arthritis, Osteoarthritis, Psoriatic Arthritis). Thanks to image recognition and artificial intelligence, Atreon is able to detect and monitor inflammation and swelling in joints using a smartphone picture from the hand. This technology has a significant potential to improve arthritis monitoring and patient care. We aim to develop an app-based monitoring tool that people can regularly and easily use to monitor their disease activity.