About this app
Calculate continuous compound interest for your investments. This is great for 401k earnings estimations, SMP 500 investment returns, or any investment where you know the numbers to use in the estimation.
Latest release
What’s New
New look and feel
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 24, 2026 · 1:55 PM Free