Here is one solution that works in most cases:
Try clearing the cache (within Settings->Applications) for the Google Play Store app and also for Google Play Services app. If that doesn't solve the problem, then try clearing the data for iReal Pro. (make a backup of your songs before)
Let us know if it solved the problem.
Its an Afunta tablet. To clarify, this is not an update. Its the 1st time install on this device. I'll try clearing the cache when I get home. Here are the details....
Model: AFX02
OS: Android 4.4
Processor: Allwinner A31S (Quad-Core, Cortex-A7)