See The Growth
Future Balance and Net Gain on a clear green chart. Explore years and months, with your starting balance included.
COMPOUND INTEREST, MADE VISIBLE
Small steps today.
A future you can see.
A compound interest calculator for iPhone and iPad. See how regular contributions could grow, compare plans, and work backward from a savings goal.
US $2.99 once. Every feature included. Local prices are shown in the App Store.
No ads. No subscription. No account. Your calculations stay on your device.
What Could A Small Change Do?
Compare Two Plans
Change a contribution, return or timeline beside your current plan. Keep your original inputs until you apply an alternative.
Find A Path To Your Goal
Solve for a contribution, time to goal or required annual return. A calculated return is a hypothetical requirement, not a forecast.
Keep The Whole Picture
Share a detailed PDF or export a CSV with inputs, assumptions and monthly numbers. No surprise feature upgrades.
Real App Screens
Compare Two Plans
Change a contribution, return or timeline beside your current plan. Keep your original inputs until you apply an alternative.
Example: USD 44,115 starting balance + USD 580 per month for 22 years; 11% assumed nominal annual return, monthly compounding, deposits at month-end. Hypothetical; taxes and fees excluded.
How It Works →
See A Sample Report
Download a real report generated by the app from the same fictional example. It includes the assumptions, breakdown and monthly schedule.
Example: USD 44,115 starting balance + USD 580 per month for 22 years; 11% assumed nominal annual return, monthly compounding, deposits at month-end. Hypothetical; taxes and fees excluded.
Questions Before You Download
Is Chip a one-time purchase?
Yes. The US App Store price is $2.99, paid once for all app features. There are no subscriptions, ads or in-app purchases. Apple shows the local price in each storefront.
Can I calculate monthly contributions?
Yes. Enter a starting balance, nominal annual return, years and extra months, then a contribution and its frequency. Contribution frequency and compounding are independent.
Can I compare two savings plans?
Yes. Compare Plans keeps Current Plan beside an editable Alternative. You can change assumptions without replacing your main plan until you choose Apply.