As we have tested them, Samsung tablets are more than capable of running the Myprogress app smoothly and without freezing. The most likely cause of performance problems will come from other apps which have been installed, apps which are particularly bad include Facebook Messenger, Facebook, WhatsApp, Snapchat and most games. However you will only notice significant performance degradation once you've installed several of these and other apps which have background processes. In most cases, simply uninstalling these apps will solve the problem, in more extreme cases, resetting the tablet will be required.
If the screen display keeps shutting off after a short period you probably need to extend the screen time out setting. On some tablets this can be set as short as 30 seconds. We recommend changing this in the settings to 30 minutes please see screen timeout for more information on how to do this.
Please see the article on Uninstalling Apps on Samsung Tablets for more information on how to do this.