There are plenty of free image editors for Android out there, but all of them suffer from major flaws. Most free image editors downsize your pictures to a single megapixel or so. They're either unable or unwilling to preserve your image resolution. And all (free) image editors lose your exif tags.
Correction: all (free) image editors lose your exif tags, except for
Edit: An Aviary update added an icon. You can now launch it like any other app.
Aviary used to downsample your pictures, but now it keeps them all up to
Aviary is working on a fix, but nobody knows when it will be ready.
Update: Fixed! Aviary now keeps your exif tags the way you want them.
Easy Photo Editor
Easy Photo Editor looks like Aviary because it is built on Aviary, but there are a few differences between the apps. Easy Photo Editor has ads, but those are easily tamed with apps like AdAway. It doesn't let you choose your own folder to save edited pictures, so you'll have to move 'em with a file manager or an app like QuickPic after you're done editing. Not a big deal either, but a fix would be welcome anyway.
The big difference is that Easy Photo Editor learned to preserve your exif data. It took a few updates and a bit of trial and error, but the good news is that it works. Easy Photo Editor still changes the "last modified" date of your image file, but QuickPic comes with an option to repair that.
Update: Not a difference anymore. Aviary now keeps your exif tags the way you want them.
Aviary or Easy Photo Editor, tough choice. Easy Photo Editor is a wrapper around Aviary, so both apps come with the same set of editing tools: brightness, contrast, colors, saturation, effects like sepia, red eye removal, and one click touchup.
Aviary lets you choose your own target folder, and it doesn't have ads. For now I use
• Easy Photo Editor by Paradise Android (make sure you get the right one, and not the piece of junk from CBS Co., Ltd.)