Simple Compound Interest vs Compounder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple Compound Interest
Easily calculate the future value of your investments. Input your initial capital, monthly contributions, annual interest rate, and investment duration to see your projected final return, total invested amount, and growth rate. Save multiple scenarios and view monthly progress.
- Calculate final return
- Calculate total investment amount
- Calculate return rate
- Save investment conditions
- Show monthly increase
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"If I invest $300 every month, how much will I have in 10 years?" This app gives you an instant answer. Just enter your principal, monthly investment amount, annual interest rate, and investment period to instantly simulate how compound interest grows your wealth. 【Key Features】 * Automatically calculate final assets, total investment, and profit * View monthly asset growth in list and graph formats * Save multiple scenarios for comparison See the power of compound interest for yourself.
Compounder
Calculate the growth of savings and investments using compound interest. Explore how regular contributions and withdrawals impact your financial goals over time. Designed for anyone to understand and utilize the power of compounding for wealth building.
- Calculate compound interest
- Flexible settings
- Factor in periodic withdrawals
- Factor in additional contributions
- Easy-to-use interface
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Compounder lets you easily calculate the power of compound interest to reach your financial goals—whether for savings, investments, or retirement planning. What is compound interest? Compound interest is the interest calculated on both the initial principal and the accumulated interest from previous periods. This powerful tool can make a big difference over time! Example: Imagine starting with $1,000 in savings, contributing $500 monthly at an 11% annual return. After 40 years, that account could grow to $4.38 million! Even small, regular contributions—like the average American car payment—can build lasting wealth. Features: Quickly calculate compound interest with flexible settings. Factor in periodic withdrawals or additional contributions to see how they affect your growth. Easy-to-use interface, designed for anyone wanting to understand and harness compound interest, without needing a finance background. You don’t need to be a Wall Street broker to become a millionaire. Start planning your financial future with Compounder today!
Screenshots
Verdict
The clearest difference is ads: Compounder at none against Simple Compound Interest's shown. Compounder also leads on update cadence (every 3 weeks vs every 6 months) and ratings volume (3.4K vs 23). On price, rating, review sentiment and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.7 for Simple Compound Interest against 4.8 for Compounder. That said, the two scores are not equally well evidenced: Compounder has 3.4K ratings behind it against 23, so its average is the more settled of the two. Written reviews are what separate them: 56% of Simple Compound Interest's written reviews are positive against 60% of Compounder's.
Simple Compound Interest ships an update every 6 months, Compounder every 3 weeks. The most recent releases landed on August 20, 2026 and September 22, 2026 respectively.
| Parameter | Simple Compound Interest | Compounder |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (23 ratings) | 4.8 (3.4K ratings) — better |
| Positive reviews | 55.6% of reviews | 60.0% of reviews — better |
| Number of ratings | 23 | 3.4K — better |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Stack3 | James Bevins |
Customer experience
Simple Compound Interest
Compounder
Bugs and requests
Simple Compound Interest
Not enough reviews yet to summarise bugs or requests.
Compounder
Reported bugs
3 issues- Calculation issues with initial investment
- Formatting issues on mobile devices
- Crashes after short usage
Requested features
5 requests- Add percentage option for withdrawal
- Allow adjusting periodic contributions (weekly, monthly, etc.)
- Include daily compounding option
- Add inflation adjustment to contributions and outputs
- Create a widget version
In-app purchases
Simple Compound Interest
No in-app purchases
Compounder
No in-app purchases
Questions
Is Simple Compound Interest free?
Is Compounder free?
Which has better reviews, Simple Compound Interest or Compounder?
Do Simple Compound Interest or Compounder have ads?
Which is updated more often, Simple Compound Interest or Compounder?
Other comparisons
