Works like a charm
This app has a lot of unique features, Ive been using it for a while now and had to ask how to use some of them but always got a quick response from dev... I am running it on iOS9 with multitasking on iPad Pro + also on my iPhone 6s and the latest watchOS 2 as well - if you like to save time, I recommend over many others ;-)
MasterYodaX about
CALC Smart Calculator ±