Compound Interest Calc + vs Compounder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Compound Interest Calc +
Calculate compound interest and future investment values with various parameters like principal, interest rate, and additional deposits. Export results to PDF or CSV and compare saved calculations.
- Compound interest calculation
- Future value projection
- Support for principal, interest, duration, inflation, and deposits
- Flexible compounding and deposit frequencies
- Detailed results including inflation-adjusted balance
- PDF and CSV export
- Save and compare calculations
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Compound Interest Calc + is the best app for quickly calculating compound interest and the future value of investments. Compound Interest Calc + features: · support for starting principal, interest, duration, inflation and additional deposits · support for additions to be made at the beginning or end of the period · daily, weekly, bi-weekly, monthly, bi-monthly, quarterly, semi-annual and annual compound frequency and additions frequency options · results that include final balance, inflation adjusted, total interest and total additions · PDF and CSV (Excel or Numbers) export options · saving of calculations for viewing later · comparing the results of saved calculations · a complete amortization schedule · a beautifully designed interface · available in English, French, and Spanish! I love feedback! I want this app to work for you. Let me know if you’d like to see any additional features or if something is not quite working correctly. You can submit feedback right from within the app.
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 price: Compounder at Free against Compound Interest Calc +'s $2.99. Compounder also leads on ratings volume (3.4K vs 34) and review sentiment (60% vs 36%). Compound Interest Calc +'s advantage is iOS requirement (13.0 vs 16.0). On rating, update cadence, ads 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
Compounder is free to download; Compound Interest Calc + costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.8 for Compound Interest Calc + against 4.8 for Compounder. That said, the two scores are not equally well evidenced: Compounder has 3.4K ratings behind it against 34, so its average is the more settled of the two. Written reviews are what separate them: 36% of Compound Interest Calc +'s written reviews are positive against 60% of Compounder's.
Compound Interest Calc + ships an update fortnightly, Compounder every 3 weeks. The most recent releases landed on September 14, 2026 and September 22, 2026 respectively.
| Parameter | Compound Interest Calc + | Compounder |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.8 (34 ratings) | 4.8 (3.4K ratings) |
| Positive reviews | 36.4% of reviews | 60.0% of reviews — better |
| Number of ratings | 34 | 3.4K — better |
| Update frequency | Fortnightly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Adam Fahlman | James Bevins |
Customer experience
Compound Interest Calc +
Compounder
Bugs and requests
Compound Interest Calc +
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
Compound Interest Calc +
No in-app purchases
Compounder
No in-app purchases
Questions
Is Compound Interest Calc + free?
Is Compounder free?
Which has better reviews, Compound Interest Calc + or Compounder?
Do Compound Interest Calc + or Compounder have ads?
Which is updated more often, Compound Interest Calc + or Compounder?
Other comparisons
