[Tomassci (OP)]

Do yo know any app for Android (or mobile-friendly web), which can edit photos, and if possible, be similiar to GIMP? Another thing is that it should be free. Main feature I want is photo  merging.

[chris]

There's pixelr, which I've used a few times and seems pretty user friendly.

[guancha]

Polarr is quite powerful, but it requires a subscription to get the most from it. I do enjoy VSCO, and I pay for the yearly subscription. Snapseed, as already mentioned, is my favorite free option (because you can edit DNGs).

drawing tablet are good for photo editing,  I have XP-Pen Deco Pro  Android Drawing Tablet( xp-pen.com/product/432.html ) and I don't need anything better. it  supports connection with Android tablets and mobile phones. I