Compound Interest - Compounder1.3.1 - App Store

Unlock the Power of Compound Interest: See Your Money Grow Over Time

Ever wondered how much your savings could grow if you started investing today? With Compound Interest, you can instantly see the impact of saving and investing on your future wealth.

Start Saving Early and Watch Your Money Grow

What if you started saving for retirement at just 15 instead of 40? By contributing just $100 a week with a 7% return, you could accumulate over $2 million by the time you retire. You may wonder: "How is that possible when I’m only saving $260,000?" The answer lies in the power of compound interest. While your direct savings would total just over $250,000, the additional $2 million comes from the growth of your investments over time. Impressive, right?

Reach Your Retirement Goals with Ease

Already have a target in mind? You can easily adjust the settings to calculate your required contribution, desired return rate, or even the time frame needed. For example, if your goal is to retire with $5 million but you're unsure how much to save each month, simply switch to the "solve for contribution" mode, and the app will automatically calculate the amount you need to save to reach your goal.

Key Features:

Visualize Your Future: Easily calculate how your savings or investments could grow over the next 30 years (or more) with interactive graphs that break down your gains year by year.
Plan for Your Goals: Want to retire a millionaire? Set your target goal, and let the app calculate how much you need to save each month, the return rate, or how long it will take to get there.
Experiment with Different Scenarios: Test different saving strategies with the option to create multiple tabs. Try saving $100/week for 10 years, then adjusting your contributions-see the real impact of compound interest!
Flexible Calculations: Whether you're solving for total balance, contribution amount, return rate, or investment length, Compound Interest makes it easy to adjust your plan and reach your financial goals.
Advanced Tab References: Link one tab's balance to another for more complex calculations. Want to try saving more for a few years and less later? It's easy to reference and compare different strategies.
Customizable Themes: Switch between light and dark modes to suit your style.
Why You'll Love It:

See exactly how compound interest works and how small changes in saving habits can lead to huge financial gains.
Perfect for retirement planning, saving for big goals, or simply exploring the magic of compounding.
Simple, intuitive design for easy use no matter your financial knowledge.
Start planning today, and watch your future wealth grow with Compound Interest!

Version History Bug fixes and improvements 1.3.1 04/07/2025 Tab References:
You can now reference one tab's total balance in another's initial balance. This is great for scenarios where you want to change the contribution amount or return rate in future years. For example, you can now experiment with the scenario of contributing $500 for 10 years followed by $0 for the next 10 years, and see the effects of compound interest over a 20 year time period. To reference another tab just tap into the starting balance and you'll see a toolbar above the keyboard with tabs that can be referenced.

Negative Return Rates and Contributions:
You can now invert your return rate or contributions to make them negative.

More Tabs:
There's no longer a limit on how many tabs you can add.

Customize Currency Symbol:
It's now possible to choose a different currency symbol than the symbol defined by your device's region. Head to the settings menu to see the options. 1.3.0 04/06/2022 - Added support for light/dark mode to use system settings on iOS 13. 1.2.0 09/30/2019 With version 1.1.0 we've added some exciting new features. 
Already have an end goal in mind? Instead solve for contribution amount, return rate, or length. Want to retire with $5,000,000 but aren't sure how much you need to be saving each month to reach that goal? Switch the mode to solve for contribution amount and it will automatically calculate that number.

• Solve for Total
• Solve for Contribution Amount
• Solve for Return Rate
• Solve for Length 1.1.0 07/29/2019 - Changed the default setting to compounded annually.
- Added options to compound Quarterly and Semi Annually.
- Minor design tweaks. 1.0.1 03/29/2019 1.0.0 03/27/2019