The 17BII-Pro calculator application is a extensive set of menus and enhancements builded over a modified simulation of the real HP-17BII Business Consultant calculators by Hewlett Packard with more functions than the real one in a beautiful high definition interface.

The 17BII-Pro works in the same way of the real calculator. But, more functionalities were added, some were modified and others deleted in order to offer a calculator with the best user experience in the modern iOS devices.

Scientific & Math functionality:
- Angles & Polar: Angular conversions units ‘from’ or ’to' Deg, Rad, Grad, degree-minute-second and % slope.
- Complete set of common scientific functions (Trig., Hyp, Log, etc.)
- Complex Math: Operations and functions with complex numbers stack.
- Curve Fitting: six regression models to fit a curve over a two selected data- lists.
- One and two variables statistics.
- Probability Distributions: Normal, t-Student, Exponential & Weibull distributions.
- Triangle solution for ASA, SAS, SSA & SSS data.
- Fundamental Universal Constants fron NIST-CODATA.
- Units Conversion: Adds a powerful and completely customizable physical units conversion.
- Units Editor: Add, delete, edit and order the units and categories.
Financial & Business functionality:
- Black-Scholes OVM: Calculates “Call” & “Put” options prices of European Options.
- Bonds Price & Yield: with Annual or Semiannual coupons and Actual or 30/360 calendars.
- Cash Flows Calculations: Calculates NPV,i%,IRR%,NFV,MIRR, NUS, etc. over cash flows series.
- Cash Flows Editor: Create, Edit, Save & Load cash flows series.
- Currency Exchange: All world currencies with actual online rates from google finance.
- Depreciation with DB, SOYD or SL methods.
- Interest conversion with effective rate comparison for up to three nominal rates.
- Margins & Break-Even: calculate business margins and production break-even over all variables.
- Percent Change and Percent Total.
- TVM calculations: “Time Value of Money” problems for loans, amortizations, mortgages, etc.
- Tip & Bill Split: Calculates tips over a bill and split the total amount over participants.
Other General functionality:
- Data-List Editor to create, edit, save & load data values for CFLO and SUM calculations.
- Date & Time: Perform calculations over date and time variables.
- Equation Solver for any variable given the others.
- Memory Content: View All with Backup & Restore through text emails.
- Settings: Customize many settings, including formats, sounds, interface, etc.
- Help Documents: A complete set of short documents with examples of all menus.

System requirements: iOS 11.0 or above.


What's New

Version 5.0.1

- Business menu calculation modification to explicitly show when a variable is store or calculate the value.
- Fixed a bug in “Codata:Universal Constants” where some constants are zero.
- Fixed a bug regarding the #P parameter in amortization menu.

Ratings and Reviews

4 out of 5

34 Ratings

34 Ratings

Most configurable calc out there


This app has a number of great standard functions (Time Value of Money, etc) but the Solver emulation is what sold me, and what I used extensively back when I had the HP hardware. Simply create your own equation with your variables, enter your variables and values and it will solve for the one value that is missing! And you can save as many of your own formulas as you like. I used it for figuring weights or lengths on roll goods but you can adapt it your own needs/profession. One of the most user-friendly calc apps imo.

Amazing! Runs perfectly on an iPhone 7+


The app has not been updated in a few years so I was hesitant to drop $5 on it, but I did and I am glad I did. This app runs perfectly on an iPhone 7+. I will add that it is not adapted to the 4.7" and 5.5" screen sizes. That isn't a huge deal but for those who care, I give you that information. The app starts up quickly, so the review from 2014 about slow start times is not an issue on newer equipment.

Just like I remembered (and then some!)


The HP17B II was my trusty sidekick all through graduate school. Sadly mine died years ago. This is not only a spot on IOS version, but it adds bells and whistles in the form of additional functions (conversions, tips, scientific tools, and otherwise). Loads fast on my iPhone 6. What a nice surprise to find this app.


Ricardo Lira Matte
20.3 MB
Requires iOS 11.0 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular, and iPod touch.
Age Rating
Rated 4+
© Ricardo Lira Matte


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    With Family Sharing set up, up to six family members can use this app.

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