Principle Mirror vs Throughline

Principle Mirror is the companion app to Principle for Mac, a tool for designing interactive interfaces. Principle Mirror can open Principle files from other apps or mirror Principle for Mac when plugged in. “I just wanted to write to you quickly just to say — this. is. amazing. while I was watching the first tutorial I got tears in my eyes! seriously.” Hugo Ahlberg Designer, IDEO "This tool is amazing, very well done." Patrick Wong Designer, Lyft

Turn spoken thoughts into structured notes and to-dos. Throughline is for people who think out loud: on a walk, between errands, or while planning the day ahead. Record in your own words. Throughline transcribes your voice note and pulls out useful details and next actions, so you can return to what matters. KEEP YOUR NEXT STEPS TOGETHER See extracted tasks in one Running List, organized into Today, This week, and Later. Move tasks when plans change, mark them complete, and return to the note they came from. CAPTURE, THEN KEEP GOING Follow recordings in the capture tray as they upload and process. If something needs attention, recovery controls help you pick up where you left off. KEEP THE SOURCE CLOSE Review your transcript alongside the structured note. Correct the result and keep your own words within reach. LET YOUR AGENT READ Connect your own AI agent through MCP to read saved notes. You control agent access and can revoke it in Settings. Start with a guided voice demo and see a spoken thought become a useful note.