Its because you already have the app ,
You have to uninstall it . You get it on Google play only because 
This happens alot on apkpure

Same its Not cool

Dude, no offense, but if you have Google play, just download it through Google play. Updates should be on time every time. This APK app is just a slow wannabe version of Google play for Kindle and Apple devices to download games otherwise unavailable without Google play services, but if you already have a capable device with Google play services, stick with it. They don't give near as much trouble