Team Win Recovery Project (TWRP) is a custom recovery image for Android-based devices. It provides a touchscreen-enabled interface which allows users to install third-party firmware and backup the current system, which are often unsupported by stock recovery images.
Pitch Black Recovery is a fork of TWRP with many improvements to make your experience better. It's more flexible & easy to use. Pitch Black Recovery was started in March 18 2018 with the movement to enhance TWRP with better customizatons, themes and features.