# Easy Compound Interest Calc — the effect of investment

> Calculate simple vs. compound interest with customizable investment and tax options. (iPhone/iPad app by Hiromichi Fujiwara.)

- Source: https://appshunter.io/ios/app/easy-compound-interest-calc/id1527905468 (this page in markdown: same URL + `.md`)
- Developer: [Hiromichi Fujiwara](https://appshunter.io/developer/1313271889)
- Category: Business, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 33 MB
- Languages: English, Japanese
- Released: 2020-08-27
- Data updated: 2026-06-10
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/easy-compound-interest-calc/id1527905468/reviews.md

## What is Easy Compound Interest Calc?

Please calculate how much difference there is between simple interest operation and compound interest operation and check the effect of compound interest.

■ For those who want to calculate easily
- All you have to do is enter the principal before the reserve, the monthly reserve amount, the annual interest rate, and the investment period.

■ For those who want to calculate in more detail
- You can select the compound interest method(*1) and the taxation method(*2) for calculation.
*1: Year, half year, quarter, month, simple interest
*2: Tax exemption, lump sum tax at maturity, compound interest tax

■ Disclaimer
- The calculation results do not guarantee the return on investment. Please use it as a guide only.
- There is a part where the tax is calculated simply. Please consult your tax accountant for details.

If you have any comments, requests, or problems, please give us a review.

## Key features

- Calculate simple vs. compound interest
- Input principal, monthly reserve, interest rate, period
- Select compounding methods (yearly, monthly, etc.)
- Choose taxation methods (exempt, lump sum, compound)
- View investment growth effects

## Recent user reviews (10 of 44)

All indexed reviews: https://appshunter.io/ios/app/easy-compound-interest-calc/id1527905468/reviews.md

### 4/5 — 機能はよい

*2025-02-25, version 1.6.1*

宣伝が多いのは否めない

### 4/5 — 単純で分かりやすい

*2024-09-28, version 1.6.0*

資産運用ツールとしては、非常に分かり易くて良い。
非課税、課税期間を混同出来ると尚良し。

### 5/5 — タイトル通りカンタンです。

*2024-09-23, version 1.6.0*

切り崩していく時の計算ができるように、毎月の積立額にマイナスの数値を入れることができれば、尚良しです。ご検討よろしくお願いします。

### 5/5 — 将来の目標額の概算に便利

*2024-09-03, version 1.6.0*

実質的な金額は置いておいて将来いくらになるか、いくら欲しければいくらずつ積み立てていけばいいのかの概算を出すのに便利

### 4/5 — シンプルですがいい

*2024-08-14, version 1.6.0*

可もなく不可もなく操作も簡単で使いやすい。

### 4/5 — 使いやすい

*2024-06-16, version 1.6.0*

すぐ広告が入るけど使える

### 1/5 — 計算はできますが

*2024-06-12, version 1.6.0*

こうこくがうざい

### 4/5 — シンプルイズベスト！

*2024-06-08, version 1.6.0*

簡単、わかりやすい、使いやすい

### 2/5 — 広告

*2024-06-07, version 1.6.0*

広告が鬱陶しいです

### 1/5 — しょーもなっ

*2024-05-17, version 1.6.0*

たかだか複利計算程度の機能で広告まみれで操作性最悪。操作も計算結果も「直感的」とは程遠い

## Frequently asked questions about Easy Compound Interest Calc

### What does this app do?

This app allows you to calculate and compare the results of simple interest versus compound interest operations. It helps you understand the effect of compound interest on your investments by letting you input key financial details.

### What are the key features for calculating interest?

You can input your initial principal, monthly reserve amount, annual interest rate, and the investment period. For more detailed calculations, you can select different compound interest methods (e.g., yearly, monthly) and taxation methods (e.g., tax exemption, lump sum tax).

### Is this app free to use?

Yes, the app is free to use. It is supported by advertisements, which are displayed within the application.

### What kind of investments can I calculate with this app?

The app is designed to calculate the growth of investments based on principal, regular contributions, interest rate, and investment duration. It's suitable for understanding the potential returns on savings, fixed deposits, or other interest-bearing investments.

### Can I get financial advice from this app?

No, this app is for calculation purposes only and does not provide financial advice. The calculation results are a guide and do not guarantee investment returns. For tax-related details, it is recommended to consult a tax accountant.

## Version history (last 5 releases)

### 1.6.0 — 2023-09-27

Thank you for always using us.
- Improved the phenomenon where the smartphone
  becomes sluggish while using the app.

### 1.5.0 — 2022-12-09

Thank you for always using us.
- Ad SDK update supported.

### 1.4.0 — 2022-10-09

Thank you for always using us.
- Simple interest has been deleted in order to deal with the problem of abnormal termination when simple interest is selected in the compound interest method.
- The display position has been changed to prevent accidental tapping of ads.

### 1.3.0 — 2021-05-06

Thank you for always using.
- Supports "Asking Permission to Track".

### 1.2.0 — 2021-02-13

Thank you for always using us.
- You can now check the value
   by tapping the chart.
- Improved the content of the
   detailed display.

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- [investment management](https://appshunter.io/ios/app/investment-management/id1491587307)

All apps by Hiromichi Fujiwara: https://appshunter.io/developer/1313271889

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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 2026-06-10.*