Tools
They run in a second, and you can share the result with a link.
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Interest rate calculator for children
Start from the gain your child will find on the Interest line each morning. The rate follows from it, along with a check that it stays inside the app's limits.
22 August 2026 -
Compound interest calculator
What decades do to a modest sum, with the part added by compounding shown separately and the total restated in today's money.
22 August 2026 -
Savings goal calculator for children
How long your child will save for a bike, putting aside half of what they earn while you pay interest. It runs in a second, and you can share the result with a link.
22 August 2026