[otnt]

This is probably the most expensive software I've ever bought

WOW! So you never had Windows/Office or used Apple products.
As a professional I'm appreciate great tools which make life easier.
MobileSheets is so good that I bought it several times to support sole developer.

(even though it's more expensive in the UK than anywhere else - thanks Google!).

I think you should thank Brexit, Farage, Johnson.