✨ Available in 7 languages

Calculate. Project.
Build your
financial freedom

The most complete compound interest calculator for iOS. Project your capital, analyse advanced KPIs and plan your financial independence.

🍎 Download free on iOS See features →
snowballFi — Compound interest calculator
15+
Advanced financial KPIs
7
Available languages
10+
Supported currencies
Features

Everything you need
to grow your money

snowballFi combines a precise calculator with professional-grade financial analysis, in the palm of your hand.

📈

Compound Interest

Calculate your capital growth with periodic contributions, customisable compounding frequencies and annual contribution growth.

🎯

Financial KPIs

CAGR, ROI, IRR, ROCE, Payback Period, Yield on Cost, capital multiplier, NPV and more — all calculated automatically from your data.

🌡️

Inflation & Taxes

Simulate the real impact of inflation and taxation on your returns. Compare gross results against real after-tax results.

🏖️

Financial Freedom

Calculate when you will reach financial independence with the 4% rule (FIRE). Visualise your crossover point and milestones along the way.

Inside the app

Powerful. Precise.
Built for investors.

Compound interest calculator
Main calculator
Results and charts
Results & charts
Advanced KPIs
Advanced KPIs
Inflation and taxes
Inflation & taxes
FIRE financial freedom
Financial freedom (FIRE)
Detailed results
Detailed results
How it works

Three steps.
Your financial plan in seconds.

1

Enter your data

Initial capital, periodic contributions, annual interest rate and time horizon — all on one clear screen.

2

Instant results

Final capital, total interest earned, overall return and a growth chart — calculated in real time as you type.

3

Deep analysis

Enable advanced KPIs, inflation & tax simulation, and discover when you will reach financial freedom.

Included KPIs

Complete financial analysis,
no spreadsheet needed

Final Capital
Total Interest
Total ROI
CAGR
Return vs Inflation
Real Capital (adjusted)
IRR
ROCE
Payback Period
Yield on Cost
Capital Multiplier
Rule of 72
NPV
Crossover Point
FIRE / Passive Income
Capital Milestones

● Green included in the free version  ·  ● Indigo available with Premium

Plans

Free to calculate.
Premium to master it.

Start for free and unlock advanced KPIs, the full simulation suite and remove ads — with a single one-time payment.

Free
0 €
Start projecting your capital today.
  • ✓ Compound interest calculator
  • ✓ Periodic contributions
  • ✓ Growth chart
  • ✓ Basic KPIs (ROI, CAGR)
  • ✓ Inflation & tax options
  • ✕ Advanced KPIs (IRR, ROCE…)
  • ✕ Financial freedom (FIRE)
  • ✕ Includes ads
One-time payment · No subscription
Premium
€1.99
Professional analysis. Forever.
  • ✓ Everything in Free
  • ✓ 10+ advanced KPIs
  • ✓ IRR, ROCE, Payback, YoC, NPV…
  • ✓ Financial freedom (FIRE)
  • ✓ Crossover point & milestones
  • ✓ Ad-free forever
  • ✓ One-time payment — no subscription
FAQ

Frequently asked questions

What is compound interest? ▼
Compound interest is interest earned on both your initial capital and the interest already accumulated. Each period, earnings are reinvested so that your money grows exponentially over time — like a snowball rolling downhill, picking up more mass as it goes.
What is the difference between the free and Premium version? ▼
The free version includes the full calculator with charts and basic KPIs (ROI, CAGR). Premium unlocks 10+ advanced KPIs (IRR, ROCE, Payback, Yield on Cost, NPV, Multiplier…), the Financial Freedom (FIRE) module with crossover point and milestones, and removes all ads. It is a one-time payment — no subscription.
What is CAGR? ▼
CAGR (Compound Annual Growth Rate) is the annualised rate at which an investment would have grown from start to finish if it had grown at a steady rate every year. It is very useful for comparing investments with different time horizons on a like-for-like basis.
How does the Financial Freedom calculation work? ▼
snowballFi uses the 4% rule (FIRE method): the capital needed for financial independence is 25× your annual expenses. The app calculates when your projected capital will reach that target, the crossover point (when annual interest exceeds your contributions) and intermediate milestones at 25%, 50%, 75% and 100% of the target capital.
Do the calculations use the nominal or effective rate? ▼
snowballFi uses the nominal rate divided by the number of periods (standard banking convention, equivalent to Excel FV and the HP 12C). So a 7% annual rate with monthly compounding uses a periodic rate of 0.5833% per period — which is what users expect and matches standard financial calculators.
I purchased Premium but ads are still showing. ▼
Go to Settings inside the app and tap "Restore purchase". Make sure you are signed in with the same Apple ID you used to purchase. If the issue persists, contact us at albeasystems@gmail.com.
Is it available for Android? ▼
snowballFi is currently available for iPhone and iPad (iOS 16+) only. We are evaluating Android support for future versions.

Your money deserves
to work for you

Join the investors already using snowballFi to project their capital and plan their financial freedom. Free, on your iPhone.

🍎
Available on the App Store
Free · iOS 16+ · iPhone & iPad