ProfitOS is a real-time profitability software built exclusively for Mercado Libre sellers in Mexico. It connects directly to your Mercado Libre account via official API and automatically calculates your true net profit on every sale — breaking down ML commissions, shipping, VAT, income tax, and COGS using the FIFO inventory method. Key features: - Real-time dashboard: sales, net profit and margin updated instantly - Net profit per sale: every order fully broken down to the cent - Financial P&L summary with SKU filters and period comparisons - FIFO inventory control with lot management and restock alerts - Mercado Ads: ACoS, ROAS and TACoS per campaign and SKU - Profitability calculator before publishing - 5-sheet Excel tax report compatible with CONTPAQi - Multi-user with roles Free 14-day trial. No credit card required. Setup in 2 minutes.