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WealthSim

Compound interest calculator for iPhone

iPhone · iOS 18+ · free, optional Pro · no account
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About the app

WealthSim estimates how your monthly contributions could grow at your chosen rate of return, and separates what you put in from what interest adds.

It started as a web calculator and is now a native iOS app too: no account, your scenarios in your own iCloud.

For anyone who puts money aside every month, into an investment or a savings account, and wants to see where that pace leads. Then check month by month whether they're ahead of or behind their plan.

## Calculate

  • Initial capital, monthly contribution, years and return
  • Yearly bars that mark when interest overtakes what you put in
  • Fees and inflation, with the result in today's money

## My plan

  • Turn a projection into a goal with an amount and a date
  • Log your real balance each month and compare it with the route
  • If you fall behind, see how much more a month gets you back

## Pro

  • 100 possible futures from real market years
  • Compare up to three plans side by side
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FAQ

Is WealthSim free?

Yes. The free version includes the calculator and My plan, with ads. Pro adds a hundred possible futures simulated from real market years and side-by-side comparison of up to three plans.

Where are my scenarios stored?

On your iPhone, synced to your private iCloud. No account or sign-up needed.

Is this financial advice?

No. WealthSim projects at the rate of return you choose. It's an estimate, not a market prediction or an investment recommendation.

Is there a web version?

Yes. WealthSim started as a web calculator at wealthsim.app. The native app needs an iPhone running iOS 18 or later.

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Install

WealthSim is free on the App Store, with no account and no sign-up.

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WealthSim on the blog