Dee Count and Draco Calculation have been updated for iOS 9 supporting split-view and slide-over view. This means you can play Calculation while working on something else, or copy-paste more efficiently between another app and Dee Count. Note in Dee Count in slide-over view the camera will not be available for bar code scanning. Use in primary mode. These new views are available on iPad Air and newer devices.
Last year for iOS 8, Apple hinted that these new iPad features would be coming by reminding developers to prepare for these new views. I took it to heart a year ago and found that Apple’s changes to views make better sense for a more open design targeting different screen shapes and sizes. Split-view on iPad Pro should be a big step up for productivity.