Have you tried Markup from the graphene appstore?
Discussion
I would love to but it seems like after installing it does not exist on the phone. Can you explain to me like I am 5 please?
It should open as default app when you take a screenshot
Ah thx. But I would not like to screenshot each image. I want to edit from my library of existing images.
See comment above. I had to search it myself 😀