Используйте приложение APKPure
Историческую версию Mischief Maker можно получить на Android
Event Coordination combined with Social Media
Purpose of this application is to validate the user’s information and location by a unique QR code which allows the Mischief Maker (admin) to track an actual presence of the user in an event. Admin will create an event and add location/locations for that particular event, the system will generate a unique QR code for each location, the Mischief Maker will take a printout of a QR code and place it on the actual location. When a user will scan the QR code during an actual presence, the system will save the username, date & time against the location