Interest Calculator - Compound
Compound Interest & ROI
Free · In‑App Purchases
Compound Interest Calculator — Investment & Savings Planner
The most complete compound interest calculator for personal finance, savings goals, and DeFi investments. Plan your financial future with precision using advanced tools that go far beyond a basic calculator.
Why Compound Interest Calc?
Whether you're building a retirement fund, planning long-term savings, or analyzing DeFi yields, this app gives you the clarity and control to make smarter financial decisions. Simulate real-world scenarios with taxes, inflation, contributions, and withdrawals—all in one place.
Powerful Calculation Engine
- Compound interest with fully customizable periods: years, months, weeks, days, or even 6-month intervals.
- Single or multiple tax brackets, including wealth tax integration.
- Advanced contributions and withdrawals with flexible scheduling.
- Inverse ROI calculator: input your initial investment, final balance, and duration to find your real rate of return.
Save, Compare & Analyze Scenarios
- Save unlimited investment scenarios and compare them side by side.
- Sensitivity analysis: instantly see how ±10-20% variations in rate, contributions, or duration affect your final balance.
- Make data-driven decisions before committing your money.
Professional Charts & Visualizations
- Pie chart: clear breakdown of principal, profits, and taxes.
- Simple vs. Compound Interest growth comparison.
- Tax vs. Inflation impact over time.
- Purchasing power chart: see how inflation erodes your real returns.
Detailed Period-by-Period Breakdown
- Track opening balance, contributions, interest earned, withdrawals, taxes, and cumulative profit for every single period.
- Export everything as a professional PDF report to share with your advisor or keep for your records.
Built for Serious Investors
- Supports decimal precision for accurate DeFi and crypto yield calculations.
Download now and take the guesswork out of compound interest. Your future self will thank you.
- New: Save and compare scenarios
- New: Sensitivity analysis (calculate ±10-20% variations)
- New: Wealth tax integration
- New: Improved advanced withdrawals logic
- New: Purchasing power over time chart
- New: Enhanced UI
- Fix: Timeframe synchronization for duration and ROI
- Fix: Increased decimal support in input fields
- Fix: Support for 6-month periods
- Fix: Multi-period calculation logic
- Minor bugfixes
The developer, Jose Miguel Varela Marcos, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jose Miguel Varela Marcos
- Size
- 52.4 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- No ads $4.99
- Copyright
- © 2026 Mokimokiteam