PhotonCamera uses advanced algorithms for capturing and processing raw images which give unmatched HDR outputs. PhotonCamera is currently in beta stage and is having rapid development.
Features:
HDRX - This functionality enables advanced stacking of many underexposed images and creates beautiful outputs.
Utilize each camera lens, by the main, wide, macro, telephoto or even IR, a functionality not available in other open source apps.
Manual Control - Easy to use knobs to control Focus, Shutter Speed and ISO on the go.
Configurable Settings :
Number of frames(maximum)
Sharpness
Saturation
Shadow Strength
Interactive viewfinder
Enabling the grid
Enabling viewfinder rounding
Advanced mode settings
Save separate settings for each camera lens
Wide range of supported devices.
I didn’t check their Telegram. I just founded this on F-Droid and share it here.