Launched my first product on PH today — a free calculator hub for marketers and investors

Hey everyone — launched FinCalcHub Marketing today after getting tired of bouncing between different sites for financial and marketing calculations. One for ROI, another for SIP, another for tax estimates.

It covers ROAS/ROI for marketers, SIP/compound interest/retirement for investors, tax and profit margin for business owners, plus a live crypto converter and an A/B test significance calculator. No signup, everything runs in your browser.

Still early days, so genuinely would love feedback — what's missing, what would make this actually useful for your workflow?

[https://www.producthunt.com/products/fincalchub-marketing?launch=fincalchub-marketing]