MathU is also available for Palm OS and Windows Mobile

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MathU RPN calculator screen shot

MathU™ RPN 2.2 Features

Advanced RPN Scientific and Financial Calculator for iPhone

MathU™ RPN is software that turns your iPhone, iPod touch or iPad into a Reverse Polish Notation (RPN) scientific and financial calculator. The software has a natural calculator interface that allows you to easily access the many scientific functions as well as mortgage and loan functions. more info...

MathU RPN available on the App Store

MathU RPN is available exclusively via Apple's App Store. It is currently available for $19.99 USD.

When you click the App Store icon or the link above, the App Store will automatically open within iTunes 8 or higher. If this does not work, open the App Store on your iPhone or iPod touch and search for "MathU".

Product Summary Feature List Reviews Store

MathU screen shot

General Features

  • Natural calculator interface
  • Portrait and landscape keypads
  • IEEE Double precision accuracy (about 16 digits)
  • 16 element stack
  • 30 key keyboard (3 functions per key)
  • 16 digit display with SCI, FIX, and ENG formats. Exponents from -308 to 308.
  • Status indicators for shift state, angle mode, and financial annuity mode.
  • Degrees, radians, and grads angle modes
  • Preferences to set the number of digits, angle mode, number base, display format, wordsize
  • One or two line stack display
  • Ability to lock orientation (portrait or landscape)
  • Multitasking and high resolution support for iOS 4


  • 16 element stack (switchable to 4)
  • 20 global registers (directly accessible via the keyboard)
  • 5 dedicated financial registers
  • stack and register functions: clstk, clreg, clx, x<>y

Scientific Functions

  • sin, cos, tan, sin-1, cos-1, tan-1
  • ln, log, ex, 10x, yx, x2, sqrt, 1/x
  • int, frac, mod, pi
  • deg, rad, hours, H.MS, R->P, P->R

Financial Functions

  • N (number of periods)
  • i (percent interest per period)
  • PMT (payment per period)
  • PV (present value)
  • FV (future value)
  • 12×, 12÷ (annualized period and interest entry)
  • Cf0, Cfj, Nj (Cashflow entry)
  • IRR (internal rate of return)
  • NPV (net present value)
  • amort (amortization table)
  • date (date in the future and day of week)
  • Δdys (days between dates)
  • clfin (clear financial registers)
  • Annuity preference (toggle between payments due at the beginning of the period and payments due at the end of the period)
  • Date format preference (M.DY or D.MY)

Statistics Functions

  • Σ+ (accumulate statistics)
  • Σ- (remove data from statistics)
  • mean, std
  • rand (random numbers and random integers)
  • x,r,  y,r (linear regression)
  • %, % change, % total
  • N! (factorial and Gamma function)
  • clstats (clear statistics registers)

Number Base Functions

  • hex, dec, oct, bin
  • modular addition, modular subtraction, modular division, modular multiplication
  • two's complement (chs)
  • and, or, xor, not
  • shl, shr, asr (shift left, right and arithmetic shift right)
  • maskl, maskr (left and right justified masks)
  • wordsize preference (up to 48 bits)

Creative Creek, MathU, MathU Pro, RootM and One+One are trademarks of Creative Creek, LLC. All other tradenames and trademarks on the site are of their respective owners.