Financial Calculator
by joaquin grech
- Finance
- Paid
- Zombie
- Small & simple · 93
- Rating
- 3.8
- 6 ratings · US storefront
- Top 97%among 111 Finance apps
- Last update
- Mar 31, 2020
- Version 4.2
- Size
- 3 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 methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
Financial Calculator is a simple, yet powerful and accurate intuitive calculator.
Video tutorial: http://www.echoboom.com/financialcalculator/
Features:
- Time value of money.
- Growing annuities.
- Calculates N, Interest, Present Value, PMT and Future Value of money.
- Bond valuation.
- Cash flow analysis in an intuitive interface.
- Analyzes investments: Internal Rate of Return (IRR) and Net Present Value (NPV)
- Amortization and Loans. Support for Canadian mortgages.
- RPN support.
- Near instantaneous calculations.
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Note: Please, write to my address under the 'help' section when you believe you found a bug. I do read every email and fix them as soon as possible. I also try to implement all feature requests.
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As for the bad reviews: Please, read the FAQ on the help section if you believe numbers are wrong. It's usually people missing something on the settings when using the financial calculator. All emails have been answered and explained and there has not been a wrong calculation since version 1.1.
Please if your email was replied and solved, change the review since it makes it look bad for everybody else.
What’s new
Release notes for the latest version, as written by the developer.
Update for ios 13
Rank history
Daily position in the New Zealand charts. #1 is at the top.
- Best rank
- #13
- Current rank
- #14
- 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.
93/100
Small & simple
- Developer size70% · 25
Developer: 2 apps on the charts
- Audience size100% · 20
Ratings: 6
- App size100% · 10
Size: 3 MB
- Price model100% · 15
Price model: paid
- Demand proof100% · 30
Best rank #3, 109 countries
An indicator, not a fact. We can't see team size. Calculated Oct 25, 2026 · method i2
How the score worksVersion history
- 4.2LatestReleased Mar 31, 2020