Head tilted awkwardly? Try the “Head Pose” feature. Corner too dark? Use the “Selective” tool to brighten it up in a tap and a swipe. This is a good bet for the tinkering set, with plenty of options for enhancing not only entire photos but very specific sections of photos.

Google’s popular Snapseed ( Android, iOS) app manages to cram a lot of photo-fixing features into a reasonably intuitive, free app. Plus, it offers the added bonus of being available for Windows computers so you can get comfortable with one interface across multiple form factors. It’s got just enough to cover your photo-editing bases without getting too overwhelming. This is a solid everyday option for adding a little extra oomph to your photos, whether it’s straightening out crooked shots, sharpening grainy images, red-eye removal, or other effects.

The gold standard in desktop image editing, Adobe’s well-known Photoshop offering, is also available in a mobile-friendly version called Photoshop Express ( Android, iOS).