Numi is not available for iPhone but there are plenty of alternatives with similar functionality. The best iPhone alternative is NumWorks Graphing Calculator, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Numi and many of them are available for iPhone so hopefully you can find a suitable replacement. Other interesting iPhone alternatives to Numi are Calcbot (Freemium), Calca (Paid), CalcTape (Freemium) and GeoGebra Scientific Calculator (Free, Open Source).
Calca is a powerful symbolic calculator that updates as you type giving you instant answers. It solves equations and simplifies complex expressions. It's also a rich Markdown text editor so that you can explain your ideas alongside your calculations.
CalcTape is a revolutionary new kind of pocket calculator. With CalcTape, also extensive calculations remain clearly structured. CalcTape makes the arithmetic process visible - you can generate intermediate results and subsequently correct or change all numbers and operations.
Omni Calculator is a web/mobile calculator that solves concrete problems such as mortgage payment, gross margin, body mass index, break-even point, etc. It's very user-friendly, flexible and usable on web, mobile and as an embeddable web widget.
Convertbot is a unit conversion robot. Convert currency, length, mass, time and much more in an exciting new way! Converting numbers will never again be a mundane task. In addition to its innovative interface, our robot is smart enough to convert to and from mixed units.