TOOLS

Free tools for founders, product managers, engineers, teachers, doctors, lawyers...

Interactive calculators to help you make better decisions in your field

Startup & Finance

Unit Economics Calculator

Calculate LTV, CAC ratio, payback period, and monthly profit per user for your SaaS business.

Try it free

Equity Calculator

Fair equity split for co-founders based on roles, responsibilities, and time commitment.

Try it free

Security & Privacy

Security Checklist

Score your digital security with 8 simple questions.

Try it free

Open SourcemacOS App

MacSecurityGuard

Free, open-source macOS app that scans your firewall, encryption, processes, network connections, browser extensions, and more — in seconds.

Download on GitHub

Can't find what you need?

I have more tools than what you see here — many aren't uploaded yet. If you're wrestling with an engineering, product, or startup problem, reach out. I genuinely enjoy helping with this stuff.

Write me on LinkedIn

— Manu