One of my favorite calculators

This is one of my favorite calculators and it deserves more than 3 stars.
Yet today I can only give 3 for one simple reason:

Please (!!!) use size classes for the layout so I can use the calculator in split view mode on the iPad with the calculator in portrait layout while having the device rotated to landscape.

A calculator, any calculator, not seizing the opportunity to get used alongside another app (like looking up stock quotes in Safari) is totally wasting its potential.

There are calculators that can get used in split view mode, but dont we want to use the one were trained on for so long?

Please Development Team - consider my humble request and let me access your calculator more often and better.

Make it a paid in app purchase - I dont mind, think about the potential especially with the iPad Pro looming large on the horizon.

Bernhard Grabowski about BA II Plus™ Financial Calc, v1.3