How to vibe codeSession
Pomodoro focus timer with analytics and distraction blocking
stayinsession.com ↗Productivity
The verdict: can you vibe code Session?
Build a personal web-based Pomodoro clone in a weekend, but the native OS-level blocking and cross-device sync make a faithful multi-platform clone a serious undertaking.
Replicating Session as a web app or basic timer is trivial, but Session's core value relies on native macOS/iOS apps, global system hotkeys, menubar widgets, and OS-level app/website blocking. Writing native system extensions to block apps and web filters across Safari, Chrome, and Edge on macOS involves substantial low-level engineering, Apple code-signing hurdles, and complex cross-device synchronization state machines that will consume weeks of frustration.
Estimated effort: 4-6 weeks of part-time work
What you can't replicate
- Session's polished multi-platform native app codebase
- Seamless App Store distribution and established user community
- Maintained native system extension hooks for Apple silicon
Founded
2020
Raised
—
Team
1 (Solo developer)
Cheapest paid tier
$0
What Session does
A deep-work and Pomodoro-style focus timer paired with productivity analytics, native operating-system website/app blockers, and workflow integrations.
Core features
- 25-minute Pomodoro focus timer with customizable durations and pause/resume states
- macOS mini-player always-on-top window and global hotkeys
- macOS app and website blocker enforcing focus rules
- Cross-device real-time sync across macOS and iOS
- Calendar and Apple Reminders integration
- Slack status auto-updating during focus blocks
- Post-session intention and reflection notes logging
- Daily and weekly productivity analytics dashboard
The business
Pricing
- Free$0
- Pro Monthly$4.99/mo
Funding
Unknown / bootstrapped
Pay vs build, cumulative
No break-even inside 24 months at these numbers.
The hard parts of vibe coding Session
- OS-level app and website blocking across multiple browsers (Safari, Chrome, Brave, Edge) and native macOS apps
- Low-latency real-time state synchronization across multiple client devices without state drift
- Deep macOS system hooks including global keyboard hotkeys, menubar rendering, and system events
- Handling offline-to-online state conflict resolution for timer pauses and abandoned sessions
How to vibecode Session
Prerequisites
Node.jsfree
Required for building and running the backend sync server and web dashboard.
Xcodefree
Required for compiling native macOS and iOS companion apps with SwiftUI and system extensions.
GitHubfree
Source control and CI/CD triggers for backend deployment.
AI coding tools
Recommended stack
| Frontend | Swift / SwiftUI for macOS and iOS native apps |
|---|---|
| Backend | Node.js with TypeScript (Express or Fastify) for real-time WebSocket sync |
| Database | Turso (SQLite at the edge) for fast, low-latency user session logs and state storage |
| Auth | better-auth for self-hosted, lightweight TypeScript authentication |
| Payments | None (Personal use clone) |
| Other | Tailwind CSS for any companion web views, Socket.io for real-time timer state sync |
Hosting & infrastructure
| Fly.io | Hosting the Node.js WebSocket and sync backend server close to users | $3-5/mo |
| Cloudflare | DNS and static asset hosting for web companion dashboards | $0/mo |
Build guide
01Backend Sync & Database Schema Setup
Initialize the Node.js backend with TypeScript, set up Turso SQLite tables for users, sessions, intentions, and categories, and configure better-auth.
Create a new Node.js TypeScript project using Fastify and Turso for database storage. Define database schemas for users, sessions (id, user_id, duration, category, intention, notes, started_at, ended_at, status), and categories. Implement better-auth integration with email/password authentication. Add REST endpoints for fetching user session history and syncing timer states. Ensure all SQL queries use parameterized inputs and handle connection errors gracefully. Provide clear installation instructions and a .env.example file.02Real-Time WebSocket Synchronization Layer
Implement Socket.io on the backend and client connectors to handle live timer state changes, pauses, and multi-device sync.
Add Socket.io to the Fastify backend to support real-time bidirectional event synchronization for active focus timers. When a client triggers 'start_timer', 'pause_timer', 'resume_timer', or 'abandon_timer', broadcast the updated state instantly to all connected client devices belonging to the same user ID. Implement conflict resolution where the most recent timestamp wins for pause/resume actions. Write unit tests for socket connection handling and state transition logic.03macOS Native SwiftUI App Shell & Timer Engine
Build the core macOS application shell in SwiftUI featuring the Pomodoro countdown timer loop, mini-player mode, and global keyboard shortcuts.
Create a macOS native SwiftUI application with a menubar item and an always-on-top Mini Player window. Implement the core Pomodoro state machine supporting 25-minute focus intervals and short/long breaks, with customizable durations. Add global keyboard shortcuts (using Carbon or local event monitors) to toggle play, pause, and skip. Connect the timer state machine to the backend WebSocket server so active timer ticks sync in real-time.04macOS App & Website Blocker Integration
Develop the focus blocker mechanism for macOS to restrict distracting applications and URLs during active focus sessions.
Implement a distraction shielding subsystem in the macOS app. When a focus session starts, read the user's blocked app bundle identifiers and domain lists. For apps, use NSRunningApplication monitoring to terminate or hide blacklisted applications if they launch. For websites, modify the local hosts file (/etc/hosts) or implement a lightweight local Network Extension proxy filter to block specified domains during focus mode and restore normal access when the session or break ends.05Analytics, Reflections, and Slack Integration
Add post-session reflection logging, daily productivity charts, and automatic Slack status updates.
Build a Report and Analytics view in the macOS app that aggregates completed sessions by category and date, displaying total focus hours and daily trends. Implement a post-session prompt modal that captures user intentions and reflection notes, saving them to Turso. Add an integration settings panel allowing users to connect their Slack account via OAuth and automatically update their Slack status and emoji when a focus session starts or ends.06iOS Companion App & Polish
Create the companion iOS app using SwiftUI with Live Activities and widget support for remote timer control.
Create an iOS companion app using SwiftUI that connects to the same backend WebSocket and Turso database. Implement Live Activities and Lock Screen widgets to display real-time timer countdowns and provide quick action buttons (pause, resume, abandon). Ensure seamless background audio and notification triggers when focus blocks complete on either Mac or iOS.
Cost vs paying for Session
What will you build it with?
Starting total with Claude Code~$99 one-time
Starting costs (one-time)
- Apple Developer Account (optional for sideloading/local build)$99/yr
Total~$99 one-time (optional)
Ongoing costs (monthly)
- Fly.io backend server hosting$3-5/mo
- Turso database$0/mo
Total~$3-5/mo
Paying for Session
$4.99/mo
Your time to build
40-60 hours
AI tool credits
$20 (Claude Pro / Cursor)
Break-even
Not applicable (build for learning and personal utility)
Vibe code Session: FAQ
- Can you vibe code Session yourself?
- Serious undertaking — 38/100 vibecodeable. Build a personal web-based Pomodoro clone in a weekend, but the native OS-level blocking and cross-device sync make a faithful multi-platform clone a serious undertaking.
- How long does it take to vibe code Session?
- 4-6 weeks of part-time work — roughly 40-60 hours of hands-on time with an AI coding agent.
- How do you build your own Session?
- Scoped to personal use: Swift / SwiftUI for macOS and iOS native apps on the front, Node.js with TypeScript (Express or Fastify) for real-time WebSocket sync behind it, Turso (SQLite at the edge) for fast, low-latency user session logs and state storage for data. Follow the 6-step build guide on this page — each step has a paste-ready prompt for an AI coding agent.
- How do you code your own Session without being an expert?
- Use an AI coding tool (Claude Code or Cursor) and work in small steps: scaffold, data model, core screens, then deploy. Realistic effort: 4-6 weeks of part-time work. The prompts on this page are written so the AI does the heavy lifting.
- How much does it cost to vibe code Session instead of paying?
- About ~$99 one-time (optional) to start and ~$3-5/mo to run, versus $4.99/mo for Session. Break-even: Not applicable (build for learning and personal utility).
- What stack should you use to vibe code Session?
- Swift / SwiftUI for macOS and iOS native apps; Node.js with TypeScript (Express or Fastify) for real-time WebSocket sync; Turso (SQLite at the edge) for fast, low-latency user session logs and state storage; plus Tailwind CSS for any companion web views, Socket.io for real-time timer state sync.