timd77
Assistant Pro
Is you concern about not having internet access?
I'm assuming you'd have to give any app your index and the slope, so not convinced it would give much value over the calculator.
But I may be missing something.
No, it’s more that flicking between 2 web pages (the course guide and the calculator) is a bit of a pain on a phone. Flicking between a website and an app is a bit easier! 1st world problems!