Corona Health serves as a platform for deploying questionnaire-based studies in combination with recordings of mobile sensors. Through collaborative efforts from experts from public health, medicine, psychology, and computer science, Corona Health was released on Google Play and the Apple App Store in July 2020. Several studies related to physical and mental well-being were deployed and more than 17.000 questionnaires have been filled out. Corona Health proved to be a viable tool for conducting research related to the COVID-19 pandemic and can serve as a blueprint for future EMA-based studies. The data we collected will substantially improve the knowledge on mental and physical health states, traits and trajectories as well as its risk and protective factors over the course of the COVID-19 pandemic and its diverse prevention measures.