A book club
for podcasts.
Listen with friends. Take notes together. Press and hold to capture what struck you. Margin pins your voice notes to the moment in the episode that triggered them — and shows you what the friends in your club marked too.
The useful idea is usually gone by the time the episode ends. Margin gives you a way to catch it in the moment: press, speak, and come back to the exact second that made you stop and think.
Capture solo.
Discuss together.
Press and hold while you listen to capture what struck you. Then see where everyone in your club is in the same episode — and what they marked along the way.
Press & hold
A button on the lock screen, the Dynamic Island, or the Action Button. One press, anywhere.
Speak the thought
Spotify auto-pauses. We capture your voice with no time limit. Transcription runs locally.
Release & resume
Note saves with the episode timestamp baked in. Spotify resumes where you left off.
Share with your club
Listen alongside friends in a small group. See what each of you marked. Reply at the exact moment in the episode.
For people who think
through audio.
Margin is for listeners who treat podcasts as research, taste-making, or a weekly conversation with people they trust.
Catch market lessons
Save the pricing, distribution, and company-building ideas you hear before they disappear into the episode queue.
Founder podcastsTurn episodes into notes
Capture product ideas, UX references, and customer-language moments without switching apps mid-listen.
Product manager podcastsDiscuss the exact moment
Give your small group a shared layer over an episode, so the conversation starts where the thought actually happened.
Why clubs should existBuilt for the way
you actually listen.
Stays out of the way
No new podcast app. Listen wherever you already do. Margin runs alongside.
Anchors to the moment
Notes auto-timestamp 15 seconds before you press — because thoughts trail their trigger.
On-device by default
Voice transcription runs locally. Your thoughts never leave the phone.
One tap back
Every note jumps you back to the exact second on Spotify that triggered it.
Small clubs, not feeds
Listen with 2–5 friends. See where each of you is in the episode. Reply at the moment that mattered.
Discussion lives in the margin
No public feed, no algorithm. Just the friends you'd actually want to talk to about what you heard.
Marginalia.
Essays on active listening, the marginalia tradition, and the craft of capturing what matters from the things you hear.
Why I built Margin
A founder story. The moment I realized podcast insights were disappearing — and the first prototype that fixed it.
Shipping an iOS app in 5 days with AI tools
The Cursor + Claude + Xcode workflow that built Margin. What was magic, what was useless, what surprised me.
The marginalia tradition
From medieval monks to Susan Sontag — why notes in the margins have always mattered, and why they matter more now.
The best note-taking apps for podcasts in 2026
An honest review of 8 tools — Notion, Obsidian, Apple Notes, Otter, Snipd, Airr, Pocket Casts, and Margin.
Questions people
usually ask.
What is Margin?
Margin is a podcast note-taking app for iOS. It lets you capture voice notes while listening, attach them to exact episode moments, and discuss those moments with a small listening club.
Does Margin replace Spotify or Apple Podcasts?
No. Margin is a note layer, not another podcast player. It is designed to run alongside the podcast apps you already use.
Are my notes private?
Yes by default. Voice transcription runs locally, and you choose what to share with a club. Your private thoughts should stay yours.
Who is Margin for?
Founders, product managers, designers, investors, and curious listeners who hear useful ideas in podcasts and want to remember or discuss them later.
Start keeping the ideas you hear.
Join the TestFlight list for the podcast note layer built for active listeners and small clubs.
Get early access