# How to Vibe Code Your Own Bear (and Stop Paying for It)

> Markdown notes you’ll love

- Site: https://bear.app
- Category: Productivity
- Platforms: macOS app, iOS app, iPadOS app
- Verdict: **Serious undertaking** (45/100 vibecodeable)
- Estimated effort: 6+ weeks of intensive development and debugging

## Verdict

Build a subset for local use or keep paying, because matching Bear's native Mac performance and custom parser requires deep systems programming.

Bear's value relies on its native Swift/C++ architecture, custom text engine (Panda), and deep Apple ecosystem tie-ins. Replicating this via an AI coding agent on macOS means building a custom text editor view in AppKit or SwiftUI, wrapping a SQLite database, and implementing custom Markdown AST rendering. An AI assistant will struggle with complex text selection states, undo/redo stacks, and smooth inline rendering performance.

### What you can't replicate

- The exact zero-lag tactile feel of the custom C++/Swift text rendering engine
- Seamless background iCloud synchronization via CloudKit without custom server infrastructure
- The decade of artisanal UI/UX polish and Apple Design Award-winning aesthetic

## What it does

A flexible, highly polished Markdown-based note-taking and personal knowledge management application for Apple platforms with flexible tags, wiki links, and document encryption.

### Core features

- Zero-lag inline Markdown editor with syntax rendering
- Nested tag hierarchy (#work/projects/alpha#) and sidebar navigation
- Wiki-style internal note linking and automatic backlinks
- Local SQLite persistence with note-level encryption
- Multi-format document export (HTML, PDF, DOCX, EPUB, Markdown)
- OCR search inside attachments, photos, and PDFs
- Theme customization engine with custom color schemes and typography

## The business

### Pricing

- Free: Free
- Bear Pro Monthly: $2.99/mo
- Bear Pro Yearly: $29.99/yr

Founded 2016.
Team size: 3-10.

## The hard parts

- Writing a high-performance inline Markdown parsing engine without web wrapper overhead
- Implementing real-time wiki-link autocompletion and dynamic backlink calculation
- Managing robust local SQLite schema with note-level zero-knowledge encryption
- Building seamless cross-device synchronization without a custom backend server

## How to vibe code Bear

### Prerequisites

- macOS & Xcode (Free): Required to compile and run native Swift and SwiftUI macOS applications.
- Apple Developer Account ($99/yr): Required if you want to test CloudKit synchronization and distribute the app locally or via TestFlight.
- Claude Code ($20/mo): Agentic coding tool for multi-file Swift project scaffolding, debugging, and iteration.

### Recommended AI tools

- Claude Code: Best-in-class agent for setting up complex native project architectures, writing Swift models, and debugging UI constraints.
- Cursor: Ideal for fine-tuning SwiftUI views, adjusting theme color palettes, and inspecting code diffs visually.

### Stack

- Frontend: Swift, SwiftUI, AppKit
- Backend: Local execution (Swift actors)
- Database: SQLite (GRDB.swift)
- Auth: Apple ID / Local Device Auth
- Payments: App Store In-App Purchases (via RevenueCat)
- Other: CloudKit for sync, Vision Framework for OCR

### Hosting

- CloudKit (Handles zero-server note synchronization across user Apple devices securely through iCloud.): $0/mo

### Build guide

1. **Scaffold Native macOS App & Database Layer** — Initialize a new SwiftUI macOS application using Swift Package Manager and GRDB.swift for SQLite persistence. Establish the database schema for notes, tags, and relations.

```
Create a new SwiftUI macOS application project structure using Swift Package Manager. Integrate GRDB.swift as a dependency. Build a SQLite database manager that creates a `notes` table (id, title, body, is_encrypted, is_archived, is_trashed, created_at, modified_at) and a `tags` table with a many-to-many relationship. Ensure all database operations run asynchronously using Swift actors. Provide clean repository protocols for CRUD operations on notes and tags.
```

2. **Build Three-Column Navigation Sidebar & Note List** — Implement a macOS-style three-column navigation layout containing a sidebar for system views and nested tags, a filtered note list view, and the main editor pane.

```
Build a responsive three-column macOS interface using `NavigationSplitView`. The sidebar must display system views (Notes, Untagged, Today, Archive, Trash) and a dynamically computed tree of nested tags parsed from note content (e.g., `#work/projects/alpha#`). The middle column displays the filtered list of notes sorted by modification date, supporting search queries and tag selection. The detail column displays the placeholder editor view.
```

3. **Develop Inline Markdown Editor & AST Parser** — Create a high-performance text editing view capable of parsing Markdown inline, highlighting headers, bold text, lists, and code blocks without a web view.

```
Implement a custom SwiftUI text editor wrapper around `NSTextView` or SwiftUI TextEditor that performs lightweight real-time Markdown parsing. Highlight headers (`#`), bold text (`**`), lists (`-`), and code blocks dynamically. Implement support for wiki-style internal links (`[[Note Title]]`) and automatic backlink detection by scanning all notes for references to the current note's title.
```

4. **Implement Tag Parsing & Auto-Complete Engine** — Build a regex-based tag extractor that automatically indexes single and multi-word tags (#tag# or #multi word tag#) and provides auto-completion during typing.

```
Write a Swift utility service that extracts single-word tags (`#work`) and multi-word tags wrapped in double hashes (`#blog post ideas#`) from note bodies. Maintain an up-to-date cache of all active tags in the SQLite database. Implement an auto-completion overlay popover that appears when the user types `#` inside the editor, suggesting existing tags matching the current query.
```

5. **Add Note Encryption & App Locking** — Implement note-level encryption using CryptoKit and biometric authentication (Touch ID) to lock individual notes and the application.

```
Integrate Apple's CryptoKit and LocalAuthentication frameworks into the macOS app. Implement a service to encrypt and decrypt individual note bodies using AES-GCM with a user-provided passphrase or device passcode. Add a lock screen overlay when the application is backgrounded or when attempting to view encrypted notes, requiring Touch ID or password verification.
```

6. **Incorporate CloudKit Synchronization** — Configure CloudKit container synchronization to sync SQLite records and attachments across multiple Apple devices signed into the same iCloud account.

```
Configure a CloudKit container integration using Swift's `CKContainer` and `CKRecord`. Implement a sync engine that observes local SQLite changes and pushes record modifications to iCloud, while listening to remote push notifications to pull updates and resolve sync conflicts cleanly using a last-write-wins strategy based on modification timestamps.
```

7. **Export Engine & Theme Customization** — Build an export pipeline for Markdown, PDF, HTML, and DOCX, alongside a dynamic theme switcher supporting dark and light color palettes.

```
Build an export manager that converts notes into Markdown, HTML, RTF, and PDF formats using CoreText and PDFKit renderers. Create a theme engine supporting custom color palettes and font styling configurations (e.g., Solarized, Dracula, Dark Graphite) that dynamically update UI colors across the sidebar, note list, and editor.
```

### Cost vs paying

**Starting costs (one-time):**

- Apple Developer Account (optional for personal distribution): $99/yr
- Claude Pro / AI coding credits: $20
- Total: ~$119 one-time

**Ongoing costs (monthly):**

- iCloud / CloudKit storage (standard user storage): $0/mo
- Total: $0/mo

- Paying for the SaaS instead: $2.99/mo
- Build time: 60-80 hours
- AI tool credits: $20
- Break-even: 40 months of subscription fees (or priceless for learning native macOS development)

## Sources

- [Bear Official Website](https://bear.app)
- [Bear Support & FAQ Documentation](https://bear.app/faq/)
- [Wikipedia - Bear (app)](https://en.wikipedia.org/wiki/Bear_(app))
- [Shiny Frog Blog - The who, what, and why of Bear](https://blog.bear.app)