CardStack - AI agent that maximizes your credit cards

Hey PH 👋 Adam here, founder of CardStack. Quick background: I've spent my career as a product leader building digital products at scale including HBO Max, discovery+, beIN SPORTS Connect, and Real Madrid's digital platform. I've shipped products used by tens of millions of people. CardStack is the first time I've built something entirely for myself. I have 12+ credit cards and was consistently leaving $1000+ a year on the table. Not because I wasn't paying attention, I just couldn't keep track of 12 Amex Platinum credits across 8 merchants, quarterly Chase offer resets, and which card actually earns the most at my specific spending patterns. So I did what any PM does at 11pm when something bugs them enough: I built it. CardStack connects to your actual spending via Plaid and uses AI to show you exactly what you're missing — in dollars, not percentages. Which credits you've forgotten. Which card you should have used on Tuesday at that restaurant. Whether your $895 annual fee is actually justified. What's different from other apps: — Recommendations based on YOUR real transactions, not generic category rules — AI agent that tells you exactly which credits you're losing and why — Missed rewards per transaction — "you lost $4.71 here by using the wrong card" — ROI dashboard showing true net value per card after annual fees Still early, launched a couple of weeks ago. First time building my own product after years of building for others. Would love honest feedback from the PH community, especially if you're an Amex or Chase power user. Free trial available. Happy to answer anything 👇