360 Challenge is an arcade that will make you remember the geometry. At each level, your task is to hit the specified range of degrees, pointing it to the circle. Just hold your finger on the screen and it will start to fill up, release it when you think you are in the right place. I hope you remember that the circle is 360 degrees. In total, the game has 100 levels and each time the range will be less and less. But if you pass it, you will never need a protractor.
After the download is complete, the downloaded file will be displayed in the notification shade (top), and will also be located in the "Download" folder (any file manager )
Install the downloaded APK file using any file manager or by clicking on it (on the downloaded file) in the notification shade
If you are installing apps for the first time not from Google Play (but using a file manager or browser), you will need to grant the appropriate permission. This is done only once.
If the file was downloaded with the bin extension, then there are 2 options:
Change the extension of the downloaded file to apk using any file manager ("rename" function)
To update the application, install the new version of the application over (without deleting) the old one.
This update will only be possible if the previous version of the application is downloaded from us. Otherwise, there will be a signature conflict and you will see the message "Application not installed".
For what "Signatures" are and what they are for, read here.