What's New

➤ Usability Enhancements:
・ New graph view gesture added: two-finger tap zooms out graph by 2x.
・ Display memory indicators changed to minimize visual distraction.

➤ Document updates:
・ Section 4.2.2 editorial change.
・ Section 2.5 changed (re: memory indicator changes).
・ Section 5.4.1 updated (re: two-finger tap gesture).

App Description

Ease of use and beauty in mind, designed for every family member (parents, students) and professionals (finance, engineering, science) by combining comprehensive set of household financial calculations (loans, mortgages, "what-if" analyses), statistical calculations and scientific/engineering functions into a single package.

RPNscfi is a 15-digit RPN calculator with unlimited stack debt. It supports numbers greater than or equal to |2^-1022| (~10^-308), and less than |2^+1024| (~10^+308).

☆ Jump to “Section 1.3" for a quick tour.
☆ If you are not familiar with RPN calculator, please read "Section 2.6 RPN Stack & Use Patterns" for brief review.
☆ To access document, you may refer to screen shots, or better, click on Web link and visit "Document" tab.

➤ VoiceOver enabled universal app that fully supports retina display

➤ Financial calculator suits households' financial calculation needs:
・ Mortgage, Loan calculations
・ Amortization schedule (copy or e-mail, CSV or text formats; select and paste)
・ Savings plan, Pension fund calculations
・ Savings account, Appreciation, Depreciation calculations
・ Lease with/without residual value calculations
・ Interest rate conversions (e.g., dividend to annual interest rate and vice versa)
☆ Calendar functions with dynamically localized date output
・ Help you to understand and manage your budget with “what-if” analyses

➤ Statistics calculator that can be used in wide range of applications:
・ From sports to epidemiology, particle physics to finance, environmental engineering to astronomy, and much more
☆ Helps you to discover the scientist inside you!
・ Mean (μ), population (σ) and sample (s) standard deviations, weighted mean (μ.w)
・ Normal, log-normal, log-log least-square regression analyses (tested with a million data samples)
・ Equation output, x and y estimators, r: Pearson product-moment correlation coefficient
・ Powerful edit feature: edit any record, export/import your data between IOS devices and desktop computers
・ Test generator to get acquainted with statistics calculator
☆ Regression graph feature: will guide you to visually navigate your datasets!

➤ Scientific calculator with:
・ Common trigonometric, hyperbolic, logarithmic and exponentiation functions (base e, 10, and 2)
・ Arbitrary rounding, mod operation, various ceil and floor functions, percentage functions
・ Factorial function, binomial coefficient and greatest common divisor calculations

➤ Easy-to-review on-demand non-intrusive tape that:
・ Gives you true record of all calculations
・ Features copy and selective copy

➤ Built-in PDF manual packed with read-and-exercise feature:
・ Turn device portrait; tap “OPTIONS” then [help] key
・ View, e-mail or print manual
・ While reading, rotate to exercise examples, and rotate again to resume reading
・ All financial features are explained and demonstrated with annotated examples!
・ A good learning material if you are not familiar with financial calculations

➤ Easy configuration via gestures (frequent) and non-intrusive keypad (less frequent):
・ US/EU number formats, 5 number notations (DEC, FIN, ENG, SCI, UNF), 2 trigonometric angle modes (DEG, RAD)
・ Fixed-point (FIN) and fixed-digit (ENG) number notations
・ Elegantly matched 6 keypad themes, 5 keypad fonts, 3 display fonts, 2 tape fonts, and 4 display+tape font colors
・ Realistic keypad and display, 3 and 2 keypad layouts on iPhone and iPad respectively
・ Designed for minimal distraction transitioning between portrait & landscape orientations

App Screen Shots

(click to enlarge)

App Changes

March 14, 2013 Price Decrease: $4.99 -> $2.99
March 08, 2013 New version 1.62
February 02, 2013 New version 1.61
January 22, 2013 New version 1.6
January 09, 2013 New version 1.5
September 28, 2012 Initial Release