Why even download an application , check out https://www.photopea.com/ it's like Photoshop but free and browser based. Also IIRC it's made by one super nice dude.
I sometimes use online apps when I need something specific and Christ that's like the 6th level of hell on my old slow phone... Tho honestly I can't imagine how an online app can ever be equal to a local one
Cuz they just tend to be slow. I don't know how these apps behave on a 1500€ phone, but I had a pretty beefy computer at my disposal these last 2 years and web apps are just always slower, usually much slower.
And back to phones, the UI of graphics web apps rarely considers them. Or they simplify the UI to the point of being unusably dumb.
And Paint... Yes true, but again do you understand "phone"?
I've used PhotoPea and it is VERY close to Photoshop. I've had to refresh the page a few times after heavy use, but it has an auto save feature so no problem. Also can open .psd files!