Snowball: Savings Calculator
Compound Interest & ETFs
Only for iPhone
Free
iPhone
What could your ETF savings plan become? Snowball shows compound interest, inflation, taxes and costs instantly. Free, private, no account.
Plan your ETF savings in seconds. Snowball shows how monthly contributions could grow over 10, 20 or 30 years – including compound interest, fund costs, inflation and taxes.
Enter your savings rate, expected return and time horizon. Snowball calculates everything live, with clear charts instead of spreadsheets and instant feedback on every change.
ETF AND INDEX PRESETS
Start with presets for S&P 500, MSCI World, MSCI ACWI, Nasdaq-100, FTSE All-World, STOXX Europe 600, Gold and more. Returns are based on 30-year CAGR assumptions and can be adjusted freely.
COMPARE SCENARIOS
See what changes when your return, savings rate or time horizon changes. Snowball’s scenario matrix helps you understand which lever matters most.
SEE REALISTIC RESULTS
Inflation, capital gains tax, fund costs (TER) and dynamic savings rates are included, so you see a clearer picture of what may actually be left.
FIND YOUR SNOWBALL MOMENT
Discover when compounding starts to matter more than your contributions – and follow milestones on the way from five figures to six figures and beyond.
PRIVATE AND FREE
No ads. No subscription. No tracking. No account. No cloud. Your inputs stay on your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
What’s New:
- Minor bug fixes
The developer, Arno Richter, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Arno Richter
- Size
- 6.4 MB
- Category
- Finance
- Compatibility
Requires iOS 26.1 or later.
- iPhone
Requires iOS 26.1 or later.
- iPhone
- Languages
- English and German
- Age Rating
4+
- 4+
- Copyright
- © 2026 Arno Richter