# CompoundIQ: Rule of 72

> CompoundIQ: Rule of 72 (iPhone/iPad app by Nicholas Costa.)

- Source: https://appshunter.io/ios/app/compoundiq/id6761416036 (this page in markdown: same URL + `.md`)
- Developer: [Nicholas Costa](https://appshunter.io/developer/1888159762)
- Category: Finance
- Price: Free
- Age rating: 4+
- Requires: iOS 16.6 · 4 MB
- Languages: English
- Released: 2026-04-02
- Data updated: 2026-04-18
- User reviews in markdown: https://appshunter.io/ios/app/compoundiq/id6761416036/reviews.md

## What is CompoundIQ?

Rule of 72 Calculator — Find Out When Your Money Doubles

Ever wonder how long it takes for your money to double? The Rule of 72 is one of the most powerful shortcuts in personal finance — and now it's in your pocket.

Whether you're evaluating an investment, comparing savings rates, or just curious about the math behind compounding, this app makes it instant and intuitive.

What You Can Calculate:
Enter an interest rate and instantly see how long it takes your money to double. Drag the interactive slider to explore different rates in real time. Or flip it around — enter a target timeframe and find out exactly what return you need.

Key Features:
Simple calculator — input any rate, get your doubling time instantly
Interactive slider — drag from 1% to 20% and watch results update in real time
Reverse calculator — enter target years, see the required rate
Clean, intuitive interface designed for everyday use

Who It's For:
Anyone curious about how compound interest really works
Young investors evaluating savings accounts, CDs, or investment returns
Students learning about the time value of money
Anyone who wants to make smarter financial decisions

Free to Use
Rule of 72 Calculator is completely free with no subscriptions or paywalls.


## Version history (last 1 release)

### 1.0 — 2026-04-02

No release notes.

## More apps by Nicholas Costa

- [CompoundIQ: Future Value](https://appshunter.io/ios/app/compoundiq/id6761183918)
- [CompoundIQ: Retirement Savings](https://appshunter.io/ios/app/compoundiq/id6761270113)

All apps by Nicholas Costa: https://appshunter.io/developer/1888159762

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-04-18.*