Compound Interest Sim

Visualize your investment growth with compound interest calculations, interactive charts, and reverse goal planning.

Plan your financial future with Compound Interest Sim — a powerful yet easy-to-use investment growth calculator.

Whether you're saving for retirement, building an emergency fund, or exploring different investment strategies, this app helps you visualize how your money can grow over time through the power of compound interest.

KEY FEATURES:

• Compound Interest Calculator: Enter your initial investment, monthly contributions, annual interest rate, and investment period to instantly see your projected future value.

• Annual & Monthly Compounding: Switch between yearly and monthly compounding frequencies to compare results.

• Interactive Charts: Visualize your asset growth with beautiful area charts showing deposits vs. investment gains over time.

• Year-by-Year Table: View a detailed annual breakdown of your balance, deposits, and earned interest.

• Reverse Calculator: Set a financial goal and find out the required interest rate or number of years needed to reach it.

• Save & Compare Plans: Store up to 5 different investment scenarios and compare them side by side.

• Bilingual Support: Full English and Japanese localization.

• 100% Offline & Private: All calculations run locally on your device. No data is collected, stored, or transmitted.

Compound Interest Sim is designed to be a simple simulation tool to help you understand the potential of long-term investing. It is not financial advice.