Below are the problems that you are possible to meet, please find the relative solutions.
For security, your phone is set to block installation of apps obtained from unknown sources.
Reason: By default, Android system is set to block installation of apps from non-PlayStore source, including apk files directly downloaded from other websites.
Solution: Please go to System Settings – Security – Device administration, and check Unknown sources. Tap “OK” in the following pop-up window and then you are able to install successfully. And we promise our apk file is secure and trusted.
An existing package by the same name with a conflicting signature is already installed.
Reason: It might be possible that the APUS products you have installed in your phone or the apk file you have downloaded is not official.
Solution: Please uninstall the current version and download the app from www.apusapps.com or Google Play.
There was a problem parsing the package.
Reason: The APK file might have been damaged because of poor internet connection.
Solution: Please make sure your internet connection works fine, and download again.
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