On the Mac, a fast Markdown editor
A true Markdown editor that feels instant. Your formatting shows as you write, and the syntax tucks away until you need it.

Stop juggling a notes app and a todo list. Cobble keeps your ideas and the work they lead to side by side, on Mac, iPhone, and iPad.
Cobble isn’t one app stretched across every screen. On each device it works the way you already do, so there’s nothing new to learn.
Your writing belongs to you, not to an app. Every note and task is a plain Markdown file on your device, and with Cobble+ they sync through your own private iCloud.
The same notes everywhere, and writing them feels natural on whichever device you pick up.
A true Markdown editor that feels instant. Your formatting shows as you write, and the syntax tucks away until you need it.
A rich-text editor made for your fingertips. The Markdown is still there when you want it, and out of sight when you don’t.
Everything you need to get from an idea to done, one stone at a time.
Link a task to any note and it’s right there whenever you open that note, so the next step is always beside the thinking behind it. Build whatever project system fits the way you work. Schedule a task by typing it the way you’d say it, like “next Friday” or “every Monday at 9am,” and a timed alert brings it back when it’s due.
Today’s tasks and calendar events, plus room to jot down whatever the day brings, all in one place.
See your whole day without switching apps. Events from Apple Calendar show up beside your tasks, and what’s waiting in Apple Reminders lands in your Inbox, ready to become tasks.
Everything on your plate, in one list. Every open task is there, sorted by when it’s due and the note it belongs to, and notes with unfinished checklists get a nudge too.
A journal that keeps itself. Every day gets its own page, and any date you mention in a note links back to it, so looking back on a day, or ahead to one, shows everything about it.
Connect your notes and see each connection from both sides. Every note shows the notes that link to it, with the line around each mention, so related ideas find each other. Links keep working when you rename or move a note.
Write on your Mac and it’s on your iPhone moments later. Everything syncs through your own private iCloud, and no Cobble server ever sees your notes.
Change how Cobble looks with a theme. Each one sets the colors across the whole app, in light and dark, so your notes feel like your own space.
Connect Cobble to the AI assistant you use on your Mac, and it can save notes, add tasks, and find things for you. Nothing is shared until you turn it on. Separate switches decide whether your assistant can create, read, or edit, you choose which folders it can see, and everything it makes is marked as made by AI.

Cobble is coming to the App Store for Mac, iPhone, and iPad. Leave your email and we’ll tell you the day it launches.