Device Control is an app that gives you access to many different settings on your Android, some exclusively aimed at users with advanced Android knowledge.
In order to use Device Control, you need to meet two requirements. First of all, your device needs to be rooted. You can find several apps on Uptodown that help you root your device easily. The second thing you need is Busybox, also available on Uptodown.
With these two requirements met, you can access all the features in Device Control. One of the things it lets you do is increase or decrease the maximum and minimum speed of the CPU. You can also see the performance of each core in real time. Another interesting feature lets you delete system apps that you can't normally delete.
Other interesting features are: the 'tasker,' which lets you schedule different tasks; the wireless file manager that lets you manage the device's memory from any browser; and the recovery tools.
Device Control shouldn't be used lightly. You could cause severe damage to your device if you're not careful. On the other hand, you can also get the most out of your device, if you know how to use it.