About WhatIf Labo

Simulate before you decide.

whatiflabo.com is a collection of free financial simulators that help you make better decisions with your money. Every tool runs entirely in your browser — your data never leaves your device.

We believe that financial anxiety often comes from not being able to see the future clearly. Our simulators let you explore "what if" scenarios — what if I invest this instead of spending it? What if I rent instead of buy? What if I retire early?

Our principles

• Data stays with you — All calculations happen in your browser. We don't have servers that see your financial data.
• No signup required — Use any tool immediately, no account needed.
• Plain language — We explain financial concepts in words everyone can understand.
• Free forever — Core tools will always be free.

Part of a bigger picture

whatiflabo.com focuses on financial decisions. We're also building tools for mental wellness (chillstroll.com) and health habits (coming soon) — because money, mind, and body are all connected.

Built with Astro, SolidJS, and a lot of care.