Marc. - AI Idea Board

Every business idea sounds great in your own head. Marc is where you find out if it actually holds up. Marc is a whiteboard for business ideas — built for iPad and Apple Pencil. Cluster the big themes, hang your thoughts off them, sketch whatever won't fit in a box. Connected thoughts pull on each other like a force field, so the structure of your thinking becomes something you can see and feel. Then comes the part no blank page gives you: pushback. AN AI THAT DOESN'T JUST AGREE Four perspectives look at your idea and ask the questions someone will ask later anyway — better now, while it's still cheap to change your mind: • The Investor — market size, scaling, unit economics. The pitch questions, before you're in the pitch. • The Customer — value, price, switching costs. Honest objections from the person meant to pay. • The Skeptic — finds the unchecked assumptions and weak spots. Kind, but incorruptible. • Thinking Ahead — opens directions you wouldn't have reached alone. Suggestions appear as dashed "ghost" cards at the edge of a thought. Accept or dismiss is always your call — nothing lands on your board unasked. FROM SCATTERED THOUGHTS TO A PLAN • Coverage check — see at a glance which business dimension is still a blind spot. • Decision log — Marc remembers what you accepted, checked, or dropped, and when. • Business-plan draft — condense the whole board into a structured draft, honest gaps included. MADE FOR THINKING, NOT FOR BUSYWORK • Apple Pencil sketching right on the canvas • A calm, paper-and-ink design that stays out of the way • Templates like Lean Canvas and the Four Questions to beat the blank page • Undo/redo, focus mode, filters — the canvas keeps up with your thinking Start free — try Marc without an account. Boards, sketches, and structure stay free forever. Marc+ unlocks the part that thinks with you: unlimited AI perspectives and the business-plan draft. Marc+ is available as a monthly or yearly subscription. Payment is charged to your Apple ID; it renews automatically unless canceled at least 24 hours before the period ends. Manage or cancel anytime in your App Store settings. Terms: https://www.marc-ai.app/terms Privacy: https://www.marc-ai.app/privacy