I created an application on Intel XDK.
It appears ok on my HTC Desire816 5.5" Android version 5.0.2
But doesnt appear ok on my tablet which is Standart Chinese Tablet 7" and Android version 4.4.2,
Do you think, should I ask change the API SDK versions?
Build with Crosswalk. The webviews in the Android 4.x devices are very bad, that is the reason you are seeing these problems and is one of the best reasons to use Crosswalk. See this doc page > https://software.intel.com/en-us/xdk/docs/why-use-crosswalk-for-android-builds <