Interest Calculator - Compound2.1.1 - App Store

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.

Version History Improved translations. 2.1.1 May 20 • New cash flow chart.
• Improved user interface.
• Enhanced advanced contributions.
• Improved PDF reports.
• Minor bug fixes and performance improvements. 2.1.0 May 18 - 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 2.0.1 May 6 Minor bugfixes 1.2.4 Apr 7 Fixes bug with large balances and delivers significant performance improvements 1.2.3 08/11/2025 Minor bug fixes and performance improvements. 1.2.2 06/01/2025 - Updated app icon for a fresh look
- Boosted performance by 20% 1.2.1 04/29/2025 - Updated app icon for a fresh look
- Boosted performance by 20% 1.2.0 04/28/2025 - Added CAGR to REAL ROI
- Added years to double investment in the PDF
- Minor performance improvements 1.1.5 04/17/2025 Improved translations 1.1.4 01/12/2025 Minor improvements 1.1.3 09/10/2024 Improvements in the visualization of charts and small bug fixes. 1.1.2 04/03/2024 Fix simple vs compound chart. 1.1.1 03/27/2024 - Add advanced withdrawals (starting at specific period and % based on taxed profits).
- Real dates calculations instead of incremental numbers for years, months and days (new settings option).
- Allow 0 initial balance.
- Add support for 15 languages.
- Add no ads and supporter payment.
- Fix pdf columns.
- Minor themes improvements. 1.1.0 03/15/2024 Minor improvements. 1.0.8 12/18/2023 - Full amounts up to 2 decimal places are now displayed in the PDF and everywhere in the app where there is enough space.
- Fix scroll issues.
- Minor bugfixes and updates. 1.0.7 12/08/2023 - Full amounts up to 2 decimal places are now displayed in the PDF and everywhere in the app where there is enough space.
- Minor bugfixes and updates. 1.0.6 12/08/2023 Minor improvements.
Minor bugfixes. 1.0.4 08/17/2021 Minor bugfixes. 1.0.2 08/13/2021 1.0 08/13/2021