Now on Android

Compound Calc

Visualise how a starting amount and monthly contributions grow with compound interest — four sliders, one curve.

Finance Android Paid subscription

Anyone planning savings, retirement contributions, or just curious how their money compounds

Hard paywall: Premium subscription (weekly, monthly or yearly) or a one-time Lifetime purchase unlocks the full app.

Auto-renews monthly via Apple's standard subscription system.
Cancel anytime in Settings → Apple ID → Subscriptions.
Refunds are handled by the store that took the payment, under its own policy: Apple at reportaproblem.apple.com, Google Play and the Microsoft Store through your account with them.
No third-party tracking or analytics SDKs inside the app.

Your contact list, photos, location, microphone, or camera.
Any content you enter into the app (notes, logs, data) — it stays on your device unless you explicitly sync.
Identifiers used to track you across other apps.

Full details in our privacy policy.

Compound Calc is live on Google Play. Download it here. Questions? Email [email protected].