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10bii Financial Calculator

by K2 Cashflow, Inc.

  • Finance
  • Paid
  • Small & simple · 89
View on the App Store
Rating
4.7
663 ratings · US storefront
Top 52%among 68 Finance apps
Last update
Sep 30, 2026
Version 4.15
Size
15 MB
Category
Finance
Tracked since
Oct 9, 2026

Estimated revenue

A model estimate with a likely range, not a reported figure.

No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.

How this estimate is made

Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.

Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.

Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.

Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.

Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.

Full method

Screenshots

As shown on the App Store listing.

About this app

Text from the App Store listing.

Look no further, you have found the best Financial Calculator app available.

In-App Purchase: 10bii+ Features (Bonds, Breakeven, Depreciation, Trig, Probabilities) available!

5 Stars: "What is the PV of WOW? I'm sure thrilled with everything about this app! Too bad there isn't room for another star!" - Pokey

5 Stars: "This tool is excellent. It's downright marvelous! I would recommend it to any financial advisor without reservation." -John L Olsen, CLU, ChFC, AEP

5 Stars: "Awesome Financial Calculator! I use it all the time and love it!" - Tinahart2

5 Stars: "Great customer service along with the app's ease of use made this purchase a no brainer." - HarborDan

5 Stars: "I am a full-time investor in real estate and notes. This has become my "go to" app on my iPad. [It does a] wonderful job in integrating visual tools to illustrate financial cash flows. A++++" - Sanjosee

Highlights:

  • Displays current N, I/YR, PV, PMT and FV values right above buttons
  • Print or Save PDF Amortization Schedules
  • Easily enter your Uneven Cashflows in a spreadsheet-like worksheet
  • Video Tutorials in Help section
  • Draws Cashflow Diagrams for simple TVM or complex Uneven Cashflows
  • Saves Recent calculations so you can easily reload them
  • Easy Mode allows everyone to get the financial answers you need!

Finally a Financial Calculator for everyone! Whether you are a seasoned investor or you just have questions about paying off your credit card, refinancing your home, or planning your 401(k) contributions, the 10bii Financial Calculator has the answers to YOUR financial questions!

The 10bii Financial Calculator is a versatile and powerful financial calculator which features more than 105 different functions for financial analysis, business, statistics, and general mathematics. Modeled after the extremely popular HP 10bII Financial Calculator, the 10bii Financial Calculator app combines precise mathematics, intuitive display, and ease-of-use in one compact package. It allows you to easily calculate loan payments, interest rates, amortization, time value of money, investment value, and more using a combination of powerful and intuitive equation-writing functionality and helpful worksheets. The 10bii Financial Calculator's keypad has been specially designed to be easy to use and easy to see.

By expanding on HP's traditional presentation, the 10bii Financial Calculator allows quick and intuitive building and visualization of TVM (Time Value of Money) calculations and Uneven Cash Flows, lets you see the stored values of all of your memory registers in one easy view, graphs your statistical series, and lets you type in whole equations for easy review and one-touch evaluation.

With the 10bii Financial Calculator, you can:

Get answers to common financial questions WITHOUT having to know how to use a financial calculator! With the 10bii Financial Calculator's Easy Modes, answer a few simple questions worded in plain language (rather than Financial-ese) and find out just how much you'll save with that refi, how much you'll have at retirement, how long it'll take you to save up for that big purchase and more. Now with 12 Easy Modes!

Easily enter and see diagrams for Cash Flows, including rapid calculation of Net Present Value and Internal Rate of Return. A dedicated interface makes adding, editing, deleting, and reordering uneven cash flows a breeze.

Enter and analyze statistical data points, and see graphs based upon the values you enter. Includes standard calculations such as standard deviation, mean, and linear regression forecasting.

Never has using a financial calculator been so easy or intuitive. The 10bii Financial Calculator is powerful enough for the professional but accessible enough for everyone. It is an ideal tool for teaching the power of compounding interest, analyzing potential deals or business ventures, or just doing math problems, and sharing the results of your work with others.

What’s new

Release notes for the latest version, as written by the developer.

v4.15

Fixed issue with in-app purchases not being restored when requested.
Fixed a crash caused by some older Google libraries. Updated to new libraries that support iOS 27.

Rank history

Daily position in the Brazil charts. #1 is at the top.

Best rank
#74
Current rank
#76
Days charting
7 of 7

On the charts today

Small & simple score

How realistic it is for a small team to build something like this.

89/100

Small & simple

  • Developer size70% · 25

    Developer: 2 apps on the charts

  • Audience size80% · 20

    Ratings: 663

  • App size100% · 10

    Size: 15 MB

  • Price model100% · 15

    Price model: paid

  • Demand proof100% · 30

    Best rank #1, 114 countries

An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2

How the score works

Version history

  • 4.15LatestReleased Sep 30, 2026