Comparison

10BII Calc HD vs 100 Contas

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

10BII Calc HD

This advanced calculator offers over 100 functions for business, finance, math, and statistics. It simplifies complex calculations like loans, cash flows, and depreciation with an intuitive interface and specialized worksheets. Includes interactive graphs and an audit tape for tracking all computations.

Highlights
  • Over 100 business, finance, math, and statistics functions
  • Time Value of Money calculations with TVM solver
  • Cash flow analysis with dedicated editor
  • Statistical analysis and forecasting
  • Currency and unit conversions
  • Interactive graphs and audit tape
Features
Currently charting
Read full description

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. 
Features:
 •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. •Worksheets- Auto Purchase Black-Scholes Bond BreakEven Cash Flow Analysis Currency Date Depreciation Interest Conversion Lease Loan Amortization Margin & Markup Refinance Statistics Tip TVM 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."

About

100 Contas

A financial management platform designed for businesses to improve efficiency and control. It automates repetitive tasks, centralizes financial data, and provides real-time insights for smarter decision-making, allowing businesses to focus on growth.

Highlights
  • Financial management for businesses
  • Automates repetitive tasks
  • Centralizes financial information
  • Provides real-time insights
  • Supports business growth
Features
Read full description

Sobre a 100 Contas Somos uma plataforma de gestão financeira desenvolvida para empresas que buscam eficiência, controle e crescimento sustentável. Nossa missão é eliminar o trabalho manual repetitivo, centralizar informações financeiras e fornecer insights em tempo real para tomadas de decisão mais inteligentes. Com a 100 Contas, você tem mais tempo para focar no que realmente importa: fazer seu negócio crescer.

Screenshots

10BII Calc HD4 screens
100 Contas3 screens

Verdict

The call

The clearest difference is price: 100 Contas at Free against 10BII Calc HD's $8.99. 100 Contas also leads on update cadence (every 5 weeks vs every 5 months). 10BII Calc HD's advantage is ratings volume (3.8K vs 1) and chart position (#20 vs unranked). On rating, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

100 Contas is free to download; 10BII Calc HD costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for 10BII Calc HD against 5.0 for 100 Contas. That said, the two scores are not equally well evidenced: 10BII Calc HD has 3.8K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

10BII Calc HD ships an update every 5 months, 100 Contas every 5 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 6 level
10BII Calc HD versus 100 Contas: the parameters behind the verdict, then further details
Parameter10BII Calc HD100 Contas
Price$8.99Free — better
Rating4.9 (3.8K ratings)5.0 (1 ratings) — better
Positive reviews98.8% of reviews—
Number of ratings3.8K — better1
Update frequencyEvery 5 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#20 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.616.4 — better
Further details — not scored
Size4 MB52 MB
Age rating4+4+
DeveloperErnest BrockPayton Rodgerson

Bugs and requests

10BII Calc HD

Reported bugs

1 issue
  • Loan payment calculation issue after update

Requested features

2 requests
  • RPN mode
  • Canadian mortgage support

100 Contas

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

10BII Calc HD

No in-app purchases

None

100 Contas

No in-app purchases

Questions

Is 10BII Calc HD free?
10BII Calc HD costs $8.99, with no in-app purchases.
Is 100 Contas free?
100 Contas is free to download, with no in-app purchases.
Which has better reviews, 10BII Calc HD or 100 Contas?
100 Contas is rated higher. 10BII Calc HD averages 4.9 out of 5 from 3.8K ratings, while 100 Contas averages 5.0 from 1 ratings.
Do 10BII Calc HD or 100 Contas have ads?
Neither 10BII Calc HD nor 100 Contas shows ads.
Which is updated more often, 10BII Calc HD or 100 Contas?
10BII Calc HD ships an update every 5 months, and 100 Contas every 5 weeks. Most recently, 10BII Calc HD was updated on November 6, 2026 and 100 Contas on October 31, 2026.

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