The app enables reactions to media content (television, radio) to be recorded in real time (RTR measurement). In addition, users can be surveyed using a questionnaire before and after the RTR measurement.

The functionality, reliability and validity of the system are described here:
Maier, J., Hampe, J.F. & Jahn, N. (2016). Breaking Out of the Lab: Measuring Real-Time Responses to Televised Political Content in Real-World Settings. Public Opinion Quarterly 80, 542-553. https://doi.org/10.1093/poq/nfw010

Results for the TV trial in the 2021 federal election can be found here:
Maier, J., Lukowicz, P., Bast, J., Hirsch, M. & Lange, M. (2022). “Mexican Standoff” trial in Berlin. TV debates in the hot election campaign phase of 2021. Journal of Parliamentary Questions 53(1), 39-52. https://doi.org/10.5771/0340-1758-2022-1-39