Financial Calculator Premium 4+

This is my go-to financial calculator. It is pretty much everything you get from an HP-12c.
The only thing you should know about it is the SWAP (X<>Y) key is mislabeled- it looks like it got translated somehow to "X<not equals sign>Y". The key still does what it' supposed to do. It also doesn't have backspace but this wasn't on the original HP-12c so it's forgivable.
It works under iPad multitasking- (very few calculators do)-- it has some font problems in multitasking but it's usable.

I like the clean and quick design, and the fact that it works in iOS 13 multitask and split-screen modes. There is a font resizing bug, however, in multitask and split-screen modes that makes it difficult to use in these modes. When switching to these modes the fonts get larger instead of smaller and the characters are chopped off at the bottom of the feature space making them somewhat unintelligible. This is particularly a problem for the numeric display because the decimal point cannot be seen at all. I would give it 5 stars but for this bug.

Used to work great but one of the last updates changed the key colors to green, which is fine until you press the function key and they dim so much that you cant see the key labels. Supposedly they offer different color choices but I can’t find any way to change them. I’ve used this as a backup to my handheld hp12c for 5-10 years and was very happy with it until this change.

Edit. if you hit ENTER then * it will toggle to another color combo. Keep doing that until you find one you like.