Hey Product Hunt! I built Feevio because I kept bouncing between 4–5 different apps to figure out reverse tax, marketplace fees, and what I'd actually take home after a sale. None of them felt fast or focused enough for someone running a small business or side hustle. Feevio puts the 10 calculators sellers, freelancers, and small business owners actually use into one clean iOS app: • Reverse Tax & Sales Tax • Discount • Margin vs Markup • Break-Even • Marketplace Fee (with presets for eBay, Amazon, Etsy, Shopify, Stripe, PayPal) • Net Payout • Hourly Rate • % Change • Tip Split Everything updates in real time as you type, results copy with one tap, and there's an Apple Watch companion for quick checks on the go. iPad and dark mode are fully supported. It's free with ads. A single one-time purchase removes ads and unlocks premium: calculation history, saved scenarios, side-by-side comparison mode for "what if" planning, and the Apple Watch app. Would love your feedback — especially on which calculator you'd want me to add next.

Feevio

10 essential financial calculators for small business

10 essential financial calculators for small business