Hey Product Hunt community!

I built ToolsVault because commercial financial modeling and contractor estimating software is overwhelmingly gatekept behind expensive subscriptions, mandatory demo sales calls, and account registration walls just to run basic math.

ToolsVault is designed with zero friction in mind:

• 100% Free & instant browser execution — no login or email sign-up required.

• Real Estate & Debt Modeling: Multi-family DSCR underwriting and loan amortization schedules.

• Commercial Construction: 16-division CSI MasterFormat bid estimator with instant executive PDF proposal printing.

• Renewable Energy Infrastructure: BESS battery storage arbitrage and commercial solar carport steel tonnage.

• Offline PWA support so estimators and developers can use it in field trailers and jobsites without cell service.

I’d love to hear your feedback on the UX, and what specific calculators or financial models you'd like to see added next!