Absolutely the BEST and most FUNCTIONAL app!
If you work with numbers in any way shape or form, this app belongs in your phone. The developers have widely resisted the foolish idea to tack on unnecessary noise or annoying ads. I would happily pay for this app, and I hope it remains, and it’s current, pristine, amazingly functional form. To the developers, thank you! I hope you introduce away for us to optionally support you… Something similar to Wikipedia.