Pixlr Express (Android, iOS)
This versatile and fun photo editing app lets you work on a images in the gallery or new captures. You can make adjustments or add effects, overlays and borders. There are plenty of options available in all these sections. We can easily crop, resize or rotate an image or even go for an auto-fix. But there is a wide window for manual adjustments as well. When an app effect or adjustment is selected, it doesn’t just impose it on its own as it lets user to control the adjustment with slider bars. This free app is a must-have for photo freaks.