Step 1: First, download the GCam APK from the above links, as per your requirements.
Step 2: Now, install it by allowing the ‘Install From Unknown Sources.’
Step 3: After installing the GCam APK, open it, and head over to the Settings.
Step 4: Now, if you really want to level up your photos at a much greater level. Then, you can make some changes in the GCam Settings.
Step 5: Now, Turn on HDR+ Control, LIB Patcher, AWB, and Auxillary camera, which will allow you to use the Ultrawide angle lens.
Step 6: Now, you can also adjust the saturation level, as per your requirement. Also, you can turn on/off Astrophotography mode.