Umidigi Power3 und F2 have no working EIS on videos, but the Umidigi X has "EIS". How can it be possible, that the better Flagship has no working "EIS" on 1080p.
Does the app you mention enable gamma or tint correction ? Because the worst I found on my Power 3 camera is the bad gamma correction that gives bluish pictures with changing color dominants with the levels of light.
For the Camera issues I also just tried cameringo wow definite difference so far for videos but I find the default cam app better for pictures
the only I have so far was the choppy video but now with this app looks good