10BII Calc HD 4+

Ernest Brock

Designed for iPad

    • $5.99



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 h.ms+ and h.ms-, 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 3.5

• Updated for iOS15
• Added dark mode
• Added keyboard input for iPad
• Added layout direction to Settings (iPad)
• Fixed save/load of named worksheets

Ratings and Reviews

4.9 out of 5
2.1K Ratings

2.1K Ratings

T-Combs ,

This creator is a BOSS!!!

Man I have leaned into the 10B II since finance school and have never endeavored to use a different set of keystrokes. The guy who makes this occasionally and I mean like 5 years apart has to sell a new $4 version or whatever the price may be.

But the app has actual support and if apple updates to some new software this guy doesn’t leave you hanging. I can’t imagine the dude makes $24k a year off this app… this has to be a mission of mercy like the smart kid who TA’s for free at math class. Honestly super nice guy, wish I could recall his name but he replies to emails.

I endeavor to be more like this human, hats off to you. Thank you for the YEARS of faithful service and support. You are the App Store calculator O.G.!

finance and flying ,

The only calculator I use

I’ve spent a couple hundred on financial calculators over the years. This one I paid for once and have continued using it through two phone upgrades. I’m the go to guy in the office for financial calculations or just basic math and this is what I use. It is the only one I will use. Thanks team and keep up the great work!
Update*** because I don’t remember how long it’s been since the last one. I still can’t go through my life without this calculator! I use it in business, personal finance, and even flight planning calculations. This is an everyday use usually multiple times per day. Thank you for making a great calculator and continuous updates.

fulltimemonti ,

Just purchased

So far so good, but....

The layout of the keys is going to take some getting used to. I understand it is supposed to mimic the 10bii, but I never liked their layout either. The blue/violet sub keys look like they should go with the button below, not the button above. Also, the icon is clean, which is nice, but a bit bright. Since I use a fin calculator a lot and keep it on my main page, the icon was a deciding factor in my purchase.

My biggest concern is that the developer keeps updating the app. Out of the available calcs I considered, this one had the longest gap since its last update. The last 10bii I bought stopped being supported and no longer worked with ios 13. Hopefully, I never run into that issue again with any app I paid for.

App Privacy

The developer, Ernest Brock, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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