About

Last updated: November 1, 2026

Operator

compoundsim is built and run by wakita181009, an independent developer.

About this site

compoundsim is a free tool for seeing how regular investing grows with compound interest: a fixed-rate calculator, Monte Carlo simulations based on real index data, and historical index returns, in 12 languages and with no sign-up.

Contact

For questions, bug reports or other enquiries, email contact@compoundsim.app. Replies may take a few days.