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). ■ Tap “OPTIONS” and tap [Help] key to view User’s Manual • Jump to Section 1.3 for a quick tour and continue reading Section 1.4. • If you are not familiar with RPN calculator, please refer to Section 2.6. ■ VoiceOver enabled universal app ■ Financial Calculator • 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 • 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 • 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 ■ Unit System Conversion Calculator • Simple yet useful to address daily metric to/from imperial conversion needs. • 4 length, 5 area, 2 weight, 2 volume, 1+ temperature cross units conversions, plus little more. ■ Built-in PDF User’s Manual • E-mail or print User’s Manual • While reading, rotate device to exercise examples, and rotate again to resume reading • All financial features are explained and demonstrated with annotated examples ■ Additional Features • Easy-to-review on-demand non-intrusive tape • Built in tape history browser and editor • Gives you true record of all calculations • Features copy, selective copy, and e-mail. ■ Easy configuration via Gestures • 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 • 4 keypad themes, 3 keypad fonts, 3 display fonts, 3 tape fonts, and 4 display & tape font colors
Great RPN but major iOS14 issue
Both versions (RPNscfi and ProgCalc) we working fine on iPhone and iPad until iOS 14. Now on iPad there is a white bar that goes across the bottom of the screen in both portrait and landscape mode and hides the lower row of buttons. Hopefully this can be addressed in the next version!
United StatesBest rpn out there
As stated in the title, best calculator app. It's extremely powerful yet even a novice can use it. All in all, I would highly recommend. The developer is very responsive and has addressed all of my questions. Tip: There is a hidden help menu under options. Awesome feature but many may not notice it. Features that I really like: As a professional, I'm required to do fast number crunching. Love the ability to whip open the app and punch away. Black theme with blue font looks very professional and easy on the eyes. Ability to set dec or eng or fin by simple up down swipes. Also, ability to set decimal places by simple left right swipe on display panel. Features I would love to see in the long run: Ability to email directly from app in a beautiful format like Digits or Soulver. Bottom line: I would pay $5 for this. It's the scientific version of pcalc and does many things far better.
United StatesAWESOME
This is hands down the best calculator app ever. Tons of features and customer support is amazing. You can't go wrong. In fact, when I suggested that they add a delete key, they do so in a few days. How's that for customer support? Simply amazing.
United States
+ [logΓx] key replaced with [lnΓx] key, returning natural logarithm of Γ(x). + A feature that allowed User's Manual view switching back and forth to calculator on device orientation has been removed. + [atan2] key is added to Financial calculator keypad. Press [f][atan2] without any entry to learn syntax.
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