If you want to change the sliders look in Control Center on iOS 9 iPhone to give the display brightness, then a new free jailbreak tweak known as CCSmoothSlider might be worth checking out. This tweak does away with the dated look of the stock slider bars and round grabbers in Control Center and brings a flatter look to these adjustment mechanisms, which resemble progress bars instead. You can customize the text in the center of each of the bars, configure custom fill and text colors for them, and more. Let's find out how it actually works.
How To Change The Sliders Look In Control Center
In order to give the sliders in Control Center a different look first on your jailbroken iOS 9 device head to Cydia. CCSmoothSlider tweak is available as free download package so grab it and install on your device.
After you install the tweak, you can head over to Settings > CCSmoothSlider and configure all kinds of settings to complete the look you want. As you can see from the screenshot below you have the variety of options: you can not only change colors and customize text fields, but also it is possible to hide or show the slider percentage, adjust the rounded corner radius of the progress bars, and change the sensitivity of the sliders as your fingers swipe on them.
All of the settings are configured individually for each slider, so you can have two of the same looking sliders, or you can set them up to look different from one another.
After you have set the changes hit the respring button at the bottom of the preferences pane for all the settings to take place.
CCSmoothSlider is the small tweak but it not only changes the sliders look in Control Center on iOS 9 iPhone but makes your device unique.