Dav Macgyver's Photo Editor is pretty solid for that sort of thing. Not FOSS as far as I know, but very good. Used it for about 10 years now.
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Same. This is the best photo editor I've used on Android. The UI takes some getting used to, but it can do everything OP said, even the clipboard stuff. (Mostly. See below.)
It has curves, cloning, painting, cropping, rotating, resizing, add text, add image, add arbitrary shapes, and more and more. It can even make animated GIFs or extract frames from GIFs.
It's like Photoshop but not from Adobe. I paid for the pro version forever ago and have been using it for years.
Clipboard stuff: It can't open the clipboard as a file that I can tell, but you can paste the clipboard into an image using the "text/image" function. You can even have it resize the pasted image to fit the current document size. So you make a new document that's the size you want, use Text/Image to paste it in with that setting emabled.
And then you can export the current image to the clipboard using the normal save feature. Or save it to an actual file.
This is kinda cursed, but I use Snapchat if it's something quick and dirty (and quality doesn't matter)
Quality always matters to me
I've used Picsay for probably 10 years. My phone says it's the pro version, guess I paid for it at some point, and I must just copy it from phone to phone.
Can't seem to find it on Play, but it's on ApkPure
I'm pretty sure the free version didn't have ads.
I used to love that app, but it's dead and only supports 32 bit devices. I can't install it on my Pixel 7 Pro.
I'm a bit dubious about installing an app from there without being able to access the source code. It seems that it's no longer available because it's just so old. I suspect it would have problems on my phone due to that
It runs fine for me on Android 13
I'm on 16.
Krita or drawpile? https://drawpile.net/about/
Thanks.
I did try to check out Krita already, but it says it's not available for my device.
I just checked out Drawpile, and it does not render correctly on my phone. The edges are cut off and the controls/buttons are tiny af. It was just released 3 weeks ago in beta, so it's just not ready for use yet.