Board Thread:Questions and Answers/@comment-28662359-20161028230444/@comment-31123157-20161029054428

It is possible that your device is running out of memory or your device is not capable of running the application. Make sure you uninstall unnecessary applications that you do not use at all. If Minecraft still cannot work, then please be sure to have patience as the Mojang devs are working on a new patch of Pocket Edition.