I’m looking for an Android app which allows me to change the aspect ratio of images. But I want that the image gets padded and not cropped or streched/squeezed like all the apps I tried so far are doing it. I have found "Square InPic", but unfortunately this app can only create 1:1 images, while my demand is 4:5, 1:1,91 and 9:16. "No Crop for Instagram Story" has no batch mode and supports only 9:16. The app should run on Android 10 and be freeware (at least the function I need has to be free, I don’t care about features not important for me being behind a paywall).