Marten writing a note Marten relaxing on a sofa Marten at a computer Marten at a keyboard

Notes built for developers.

Markdown with code highlighting, project tabs for APIs and secrets, a Face ID-locked vault, tags, and fast full-text search. Syncs across iPhone, iPad, and Mac.

// free · light & dark · offline-first

Everything a dev note needs

One clean editor. Add only the tabs you need. Keep a note plain, or turn it into a project with secrets, links, and lists.

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Markdown + syntax highlighting

Write Markdown with fenced code blocks highlighted in an olive, code-editor palette. Toggle live preview.

Project tabs

Note, List, API, Ref, Link, Secret, Password, Social. Add a tab with “+”; each filled tab becomes an item.

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Secrets vault

Store API keys, passwords, and accounts with masked fields. Lock sensitive notes behind Face ID / Touch ID.

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Tags + full-text search

Organize with #hashtags and find anything instantly across every note.

Real-time sync

Local-first storage with optional cloud sync. Your notes follow you, online or off.

iPhone · iPad · Mac

A native SwiftUI app with adaptive layouts and a clean three-column view on iPad and Mac.

Reads like a notebook

Editorial and minimal, with a little developer flavor.

// deploy.swift
func deploy(_ env: String) async throws {
    let key = secrets["api-key"]   // #prod
    try await client.push(env, key)
}

Keep your dev brain organized

Free, private, fast. Start in seconds.

Get Marten