For improving your phone camera
Halide offers iPhone users finer control over various photo settings, including exposure time and focal points, making certain complex tweaks as easy as a screen swipe. The iOS-only app costs $6, but the “incredible” set of features is worth it.
Focos is “one of the best camera apps you can download for your iPhone.” It lets you work magic on an image after the photo is taken, adding blurring effects or adjusting the focus, depth of field, and even the location of the light source.
Open Camera is a free Android app packed with handy tools, including grid overlays, burst mode, HDR support, and focus and exposure locks.
Pocketbooth is a fun $1 iOS app that creates photo strips that look as if they were taken in a booth. The camera will flash before each shot so that you can readjust your pose.