CoCoV is an iPhone application developed by Universitatsklinikum Ulm, available for free in the Education & Reference category, specifically under the Medicine subcategory. The app serves as a tool for documenting symptoms post Corona vaccine administration and tracking the compatibility of different Corona vaccines. It aims to contribute to the fight against the ongoing Corona pandemic by enhancing the understanding of vaccine effects and potential side effects.

The app includes a questionnaire to report common vaccine side effects with predefined response options. Users can also record any side effects not covered in the questionnaire through a free-text field. CoCoV facilitates personal tracking of vaccine administration details and associated side effects for potential medical consultation. Users are encouraged to log their well-being and symptoms for 4 weeks post-vaccination, with data being transmitted pseudonymously to the University of Ulm server for analysis.