I'm using an LG k30 and seems like the APK file is just not wanting to be installed. I have about 6gb free on the phone atm but will delete more things if i need to even tho the game is only about 1.3gb in total. Does my phone meet requirements or not? If not ill probably just download the pc version.
The initial download is 1.3gb. Need this minimum just to download the apk.
Then you need 5-6 GB as it UNPACKS the APK installer package. This is where it fails usually. Due to not enough storage space to write the temp cache for the installer package + run the installer, AND write the new data to your mobile devices micro-sdcard, or hdd/ssd.
That said Majalis Duo should add this to their stores description.
That said. Hope this helps address the issue. No I am not affiliated with Majalis Duo other than a fan of the game.
