10BII Calc HD is a business calculator featuring over 100 built-in functions for business, finance, mathematics and statistics. Easily calculate loan payments, interest rates, amortization, discounted cash-flow analyses, TVM (loans, savings, and leasing), bonds and depreciation using a simplified algebraic entry system. The keyboard and display have been carefully optimized for the iPhone, iPod Touch and iPad. Two keyboard layouts and multiple specialized worksheets allow you to do much more than a 10BII calculator while maintaining compatibility with the standard.

HD version includes:

• 2 for the price of 1! iPad and iPhone versions included- use on both your iPad and iPhone

• HD graphics included for iPad and iPhone retina displays

• iPad version includes full support for slide over and split views.

• New worksheets including interactive graphs.


•Time Value of Money- Loans, savings, leases and amortization schedules using both the standard keyboard and a specialized TVM solver window that displays the contents of all the variables for rapid "what if" solutions to your problems. View and mail amortization tables.

•Interest Conversion- Nominal and effective rates.

•Cash Flows- Net present value, internal rate of return, net future value and net uniform series calculations. Up to 80 cash flows are easily edited and reviewed using the dedicated cash flow editor screen. Entries are added, deleted and modified in a scrolling display with a touch interface unique to the iPhone.

•Business Percentages- Percent change, markup, and margin calculations.

•Statistics- Mean, standard deviation, correlation coefficient, and linear regression forecasting, weighted mean. Sample editor and plotter, forecasting using linear, log, exp or power fit.

•Conversions- 47 world currency rates and over 100 commonly used metric, english and other conversion factors used in financial, business, scientific and engineering calculations.

•Scientific- sin, cos, tan, asin, acos, atan plus the hyperbolic trig functions, conversion between rectangular and polar coordinates, conversion between degrees and radians, time functions including and, log, ln, 10^x, e^x, y^x, x root of y, fraction part and integer part. Trig functions can be computed in radians, degrees or gradians.

Auto Purchase
Cash Flow Analysis
Interest Conversion
Loan Amortization
Margin & Markup

Many of the worksheets include interactive graphs.

•Audit tape records all calculations. Tape can be mailed, texted or printed.

Discover how to use any function on the keyboard by touching the ? key then the key you want to learn about. Help screens are available for all worksheets.

Quote from a customer:

"Last week I had a meeting with my accountants and my bankers. We were working on the pro forma balance sheets and cash flows for a new project I'm working on.

They were all asking why I had switched to the iPhone for I used to be a die hard "brandX phone" fan. I said that one could do so much more. They said "yea...sure" (they were all using "brandX phones") until I started using your calculator. We were analyzing different payment and amortization schedules. They were so impressed by how easily we could figure out the amount of interest, principal and remaining loan balance for any certain period or combination of periods that in the end they were saying "I have to get me one of those".

 Great product. Thanks."

What’s New

Version 3.2

• Update to work around iOS11.0.1 bugs. Apple is changing the view system without working out all the details. Important pieces such as setRightBarItems have just stopped working as a result of introducing a big black notch smack in the middle of the top of the screen. How is this a good idea? My users certainly have let me know they don't appreciate updating iOS and then their apps no longer work.
• To my users- I'm trying to stay on top of this and will continue to update the app to work around Apple's latest "design innovations" :-(
• Restored waste basket and action buttons on audit tape for iPhone
• Added taptic feedback on key touches (requires iPhone with taptic engine)

Ratings and Reviews

4.9 out of 5
212 Ratings
212 Ratings
gadgetklm ,

A+, App, updates & Developer...

I've always have loved the 10bII, I was even a little sad to shelf the good ole girl for the new iPad/iPhone App version. Wow, what an improvement! The ability of this powerful calculator with the developers worksheets make this a premium calculator. The developer is both responsive and talented. I love having it available at my side on my iPhone, but prefer the robust iPad version, and you get both! My highest recommendations for this app. Developer constantly improves and updates. This app is Highly recommended 👍🏻👍🏻👍🏻😀😀

TKoren ,

Front screen app!

The front screen of your phone is the most valuable real estate and this app has been on my front screen since purchased years ago.

Excellent interpretation of the physical calculator, always kept up to date by the developer, and just simply works!

If you have any hands on experience with the 10BII, you will not be disappointed.

Punctum eMedus ,

Powerful, easy to use, finely created

This is a great financial calculator that is very easy to use on the iPhone and iPad. In the iPad the notepad helps you to see the previous operations and it's results. If you are explaining something that requires multiple operations this feature is very powerful. There lots of useful features in this fine product. I'm very happy with it and I highly recommended it.


Ernest Brock
5.2 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2010 Ernest Brock


  • Family Sharing

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

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