This app requires ROOT permissions to change settings. By now, this app is only tested using Meizu MX4. It MAY work in other devices. This is a open source software. Project page: What settings can it change? Active cores manually. /proc/hps/enabled. /sys/devices/system/cpu/cpu /online. Minimum numbers of online big and little cores. /proc/hps/num_base_perf_serv.
Download the installer of CPU Control for MX4 1.0 free of charge and have a look at users' reviews on Droid Informer. The app can be launched on Android devices 4.1 and above. This application is totally secure for downloading. Cg.hou is the creator of CPU Control for MX4 which is included in the Tools category.
The app has been downloaded and installed by over 1K users and the most recent release is dated Jan 8, 2016. On Google Play, this application was rated 3.4 by its users.