BKlightCtl is a personalization app available for Android devices. Developed by sisipa, this free app allows users to adjust the brightness of their device's backlight. With BKlightCtl, users can set the maximum and minimum brightness levels, switch between up to three different settings, and even adjust the key backlight on models with hard keys. One of the key features of BKlightCtl is that it achieves power saving without using filters, making it an efficient option for users looking to lower their device's luminance. Overall, BKlightCtl provides users with the ability to customize and control the brightness of their device's backlight, enhancing their viewing experience.