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

> The #1 Screen Time App

- Site: https://opal.so
- Category: Digital Wellbeing & Productivity
- Platforms: iOS app, macOS app, Android app
- Verdict: **Serious undertaking** (38/100 vibecodeable)
- Estimated effort: 3 to 4 months of part-time native development

## Verdict

You can build a personal focus timer subset, but replicating Opal's system-level app blocking and zero-bypass guarantees requires writing complex native Swift code.

Opal is not a wrapper over a web API; it operates as an extension of the operating system. Replicating its core value requires navigating Apple's restricted Screen Time and ManagedSettings frameworks in Swift. While an AI coding agent can scaffold your Swift project architecture and UI views, you will spend weeks debugging low-level system permissions, network extension packet filtering, and bypass loopholes where desperate users find ways to delete profiles or tweak device time zones.

### What you can't replicate

- Opal's brand authority and 150k+ real app store review moat
- Seamless cross-platform zero-config bypass protection across iOS and Android system restrictions
- Enterprise school management configurations

## What it does

Opal protects your focus automatically by blocking distracting apps and websites, providing focus timers, and calculating an Opal Score to track digital wellbeing across iOS, macOS, and Android.

### Core features

- Screen Time API integration for system-level app blocking on iOS and macOS
- Local VPN network extensions for traffic interception and filtering
- Custom focus rules engine with schedules and app categorization
- Focus timer sessions with countdowns and strict lock-ins
- Opal Score calculation aggregating sleep, focus, and rest metrics
- Focus Gems gamified milestone tracking system
- Cross-device profile syncing

## The business

### Pricing

- Free: $0 / month
- Opal Pro Yearly: $8.29 / month
- Opal Pro Monthly: $19.99 / month
- Opal Pro Lifetime: $399 / forever

### Funding

$4.3M raised.
- Seed Round - January 2021 ($4.3M)
Investors: Adjacent, Speedinvest, Night Capital, Evan Sharp, Tim Kendall, Severin Hacker, Jean-Charles Samuelian

Founded 2020.
Team size: 11 to 30 employees.

## The hard parts

- Writing and maintaining deep native Swift bindings for Apple's Screen Time and DeviceActivity frameworks
- Engineering zero-bypass restriction locks that prevent users from deleting profiles or altering time zones to cheat blockers
- Navigating stringent Apple and Google App Store review guidelines regarding VPN profiles and system-level monitoring
- Reliable background state persistence across OS reboots and aggressive battery saver routines

## How to vibe code Opal

### Prerequisites

- Apple Mac: Required for compiling native iOS and macOS Swift applications via Xcode
- Xcode (Free): Official IDE for building and debugging Swift, SwiftUI, and Screen Time extensions
- Apple Developer Account ($99/yr): Mandatory for signing binaries and accessing provisioning profiles for the Screen Time API and Network Extensions
- Node.js (free): For running local tooling and backend sync scripts

### Recommended AI tools

- Claude Code: Best-in-class terminal agent for scaffolding multi-file Swift project structures and writing complex system extension logic
- Cursor: Ideal AI-native code editor for reviewing SwiftUI views and inspecting local state diffs
- GitHub: Version control and remote repository hosting

### Stack

- Frontend: SwiftUI
- Backend: Node.js with Express
- Database: Turso (SQLite at the edge)
- Auth: better-auth
- Payments: RevenueCat
- Other: Apple DeviceActivity Framework, Apple ManagedSettings Framework, NetworkExtension Framework

### Hosting

- Cloudflare (Hosts the lightweight companion sync API and rule store for $0/mo on Workers): $0/mo
- Turso (Provides serverless SQLite database for storing personal focus rules and score history): $0/mo

### Build guide

1. **Project Scaffolding and SwiftUI Architecture** — Initialize the native iOS and macOS project structure using SwiftUI, setting up MVVM architecture, navigation coordinators, and local persistent storage via SwiftData.

```
Create a new multiplatform SwiftUI app workspace named 'FocusGuard' targeting iOS 18+ and macOS 15+. Configure an MVVM project layout with folders for Models, Views, ViewModels, and Services. Implement a clean, modern dashboard view matching Opal's dark-mode aesthetic with cards for 'Opal Score', 'Active Focus Rules', and a prominent 'Focus Timer' start button. Set up SwiftData models for storing custom blocking rules, session histories, and local gamification gems.
```

2. **Apple Screen Time & ManagedSettings Integration** — Integrate Apple's FamilyControls and ManagedSettings frameworks to request system authorization and intercept target app usage.

```
Write a Swift service class called 'ScreenTimeManager' that interacts with Apple's FamilyControls framework to request authorization from the user. Implement ManagedSettingsStore logic to shield specific application categories and bundle identifiers when a focus rule is triggered. Handle authorization error states gracefully and provide clear fallback guidance in the SwiftUI interface when permissions are denied.
```

3. **DeviceActivity Scheduling & Rules Engine** — Implement automated rules and schedules using the DeviceActivity framework to enforce focus periods without manual intervention.

```
Implement a schedule monitoring engine using Apple's DeviceActivity framework. Create a 'FocusRule' model supporting customizable daily schedules, time windows, and targeted app selections. Write background notification observers that trigger ManagedSettings shields automatically when a scheduled focus window starts, and remove the shields precisely when the session concludes.
```

4. **Focus Timer and Strict Lock-in Mode** — Build an interactive countdown timer with strict unblock prevention to lock users out during active focus sessions.

```
Build a 'FocusTimerViewModel' that manages countdown sessions ranging from 15 minutes to 4 hours. Implement a 'Strict Mode' toggle that disables settings changes and unblock buttons while the timer is running. Add local notifications to alert the user when a session finishes and reward them with focus gems upon successful completion.
```

5. **Opal Score and Gamification Engine** — Calculate daily digital wellbeing scores and unlockable milestones (Gems) based on focus consistency.

```
Develop an 'OpalScoreCalculator' algorithm in Swift that computes a daily score from 0 to 100 based on completed focus hours, interruptions avoided, and rest periods. Create a 'FocusGemsView' grid component that displays unlockable milestones (e.g., '10 Hours Focused', '5 Days Streak') with dynamic unlocked/locked visual states driven by local progress metrics.
```

6. **Backend Sync, Auth, and RevenueCat Integration** — Connect the app to a lightweight Turso database via a Cloudflare Worker backend and integrate RevenueCat for subscription handling.

```
Implement a Node.js backend using Cloudflare Workers and Turso to sync focus rule backups and historical Opal scores across devices using better-auth for authentication. Integrate the RevenueCat SDK into the iOS app to manage Pro subscription entitlements, checking local status against server-side receipts to unlock advanced rules and historical score charts.
```

### Cost vs paying

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

- Apple Developer Program Membership: $99/yr
- AI Coding Assistant Subscriptions: $20 one-time
- Total: ~$119 one-time

**Ongoing costs (monthly):**

- Cloudflare Workers & Turso DB Free Tiers: $0/mo
- Total: $0/mo

- Paying for the SaaS instead: $8.29/mo (Pro Yearly)
- Build time: 45-60 hours
- AI tool credits: $20 (1 month of Claude Pro / Cursor)
- Break-even: 15 months (factoring Apple developer fee and build time value)

## Sources

- [Opal Official Website & Pages](https://www.opal.so/)
- [PitchBook - Opal Company Profile](https://pitchbook.com/profiles/company/251025-83)
- [Tracxn - Opal Profile & Competitors](https://tracxn.com/d/company/opal/_pBv54b3z1P1s6qY0w3K-v3P8h2Z9k1L1v2X3c4V5b6A)