Most dropshippers discover their margins are wrong after burning their ad budget. DropCalc fixes that — it's an AI-powered profit simulator for Shopify sellers. - True margin calculator (Shopify fees, processing, returns) - Ad spend simulator for Meta, TikTok, Google & Pinterest - AI product validator — GO, CAUTION, or AVOID - Weekly TikTok trend report - Reality check mode Free to try. No credit card required.