For me the killer convenience calculator on mobile has been Soulver. The UI is just perfect for making it easy to string together calculations without taking up

For me the killer convenience calculator on mobile has been Soulver. The UI is just perfect for making it easy to string together calculations without taking up too much screen real estate. Irritatingly, the Mac app is available still, but it has been pulled from the iOS App Store for a long time, and it’s not on any other platforms. If something like Soulver existed cross platform I would have it installed on everything.