We are permanently working to remove those ads that can cause technical problems to some devices. Take into account that there are minimum requirements to be met by your device. 
 
The minimum specifications required in Android are:
  • 1GB of RAM (or more recommended)
  • Android 5.0 or higher
  • 800x480 screen resolution
The minimum specifications required in iOS are:
  • 1GB of RAM (or more recommended)
  • iOS 9 or higher
  • iPhone 7 or better
  • 640 x 960 screen resolution (higher is recommended)
However, these kinds of issues could be given for many other reasons. There are multiple kinds of devices, and some of them will operate very differently than others. Please consult your device manual to refine its performance if needed.