Soulver 3
iOS iPadOS macOSNotepad, meet calculator
Soulver is a natural language notepad calculator app for the Mac, iPad & iPhone.
There are now a number of clones, but Soulver is and remains the original. I love using it at all times to add up a few numbers, calculate a rule of three or convert units. But it can also be used for complex mathematical problems. IMHO it really belongs in every software collection.
