Compound Calc

Who it's for

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

About Compound Calc

Compound Calc lets you see how money grows over time. Enter a starting amount, set monthly contributions, pick a rate and time horizon, and watch the curve build. Four sliders control the inputs so you can adjust one variable at a time and see the effect immediately.

Save up to twenty named scenarios in the premium tier, then compare plans side by side. Export results to a table or share a snapshot. No ads in the paid version. The app works offline and syncs across devices with an Apple ID.

What it does

• Four sliders control rate, time, contributions, and starting amount
• One smooth curve shows growth over time
• Save up to twenty named scenarios
• Compare plans side by side in the premium tier
• Export results to a table
• Works offline and syncs across devices

How the subscription works

free = calculate. Subscription saves up to 20 named scenarios so you can compare plans side by side and removes ads.

• Auto-renews monthly via Apple's standard subscription system.
• Cancel anytime in Settings → Apple ID → Subscriptions.
• Refunds handled by Apple per their policy at reportaproblem.apple.com.
• No third-party tracking or analytics SDKs inside the app.

What we don't collect

• 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.

TestFlight beta

This app is in private beta on TestFlight. To request an invite, email support@bestpaid.app with the subject line TestFlight beta: Compound Calc.