The Cydia Tweak Snapper 2 has been officially released and works with devices that have iOS 9 or higher. Snapper 2 is a cydia tweak that allows you to crop a portion of your screen and keep it floating while on another screen. You can even pin cropped screenshots on top of the screen in order to reference pertinent information.
For example, you can use Snapper 2 to cut out a photo that you need to describe within the Notes app. Instead of jumping back and forth between the Photos app and the Notes app, use Snapper 2 in order to view two items at once. Just a quick disclaimer, this tweak does not work on iPad but the developer is promising full iPad support really soon.
If you’re in to give this tweak a try, Snapper 2 is now available as a $1.49 package on Cydia’s BigBoss repository and fully supports iOS 9 and It works with iPhone 6s also iPhone 6s Plus. To install this program requires a jailbroken device (see if and how you can do the jailbreak to your iPhone by clicking here) and you need an Internet connection to download the package.