ProFit by Quirin develops fitness software for personal trainers, online coaches and people who train independently. The proFit app combines training and nutrition plans, workout and meal logging, progress tracking, check-ins and coach-client communication. Coaches can create reusable templates and assign individual plans to clients. Solo users receive training recommendations and nutrition plans based on their personal information. proFit is available on the web, iPhone and Android with a German-language interface.