Use APKPure App
Get CREDO Detector 2 old version APK for Android
Cosmic-Ray Extremely Distributed Observatory (CREDO)
The app uses your smartphone camera (while your phone is charging and the camera is covered) to look for the bright pixels caused by the impact of a high energy particle on the CCD detector in the camera. A small ‘thumbnail’ centered on this detection along with the time and date it occurred and were your smartphone was is sent to the CREDO servers.