Stone-D

If you use multiple photo apps like I do, this can show you the differences in output such as file size (indicates compression level), dimensions (megapixels) and more.

This is a well written piece of software and stands up against the giants very well. No silly filters or other instacrap.

... already, you must be new here. This is the King, beyond doubt. Some come close, but invariably lack in one or two key areas.

Simple in concept, this game will educate, disturb and thrill. You'll get addicted in no time. Having said this, as you must finish the current virus type on brutal difficulty before the next becomes unlocked, this essentially steers you towards in-app purchasing to unlock them. I don't blame them for using in-app purchases as an alternative to perserverence, but when it becomes the only option due to the extreme unlikeliness of you unlocking them normally... well.