How to vibe codeOpal
The #1 Screen Time App
opal.so ↗Digital Wellbeing & Productivity
The verdict: can you vibe code Opal?
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.
Estimated effort: 3 to 4 months of part-time native development
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
Founded
2020
Raised
$4.3M
Team
11 to 30 employees
Cheapest paid tier
$0 / month
What Opal 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 from Adjacent, Speedinvest, Night Capital, Evan Sharp, Tim Kendall, Severin Hacker, Jean-Charles Samuelian
Pay vs build, cumulative
Break-even at month 15 — after that, every month is money kept.
The hard parts of vibe coding Opal
- 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 vibecode Opal
Prerequisites
Apple Mac
Required for compiling native iOS and macOS Swift applications via Xcode
XcodeFree
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.jsfree
For running local tooling and backend sync scripts
AI coding tools
Recommended 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 & infrastructure
| 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
01Project 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.02Apple 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.03DeviceActivity 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.04Focus 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.05Opal 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.06Backend 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 for Opal
What will you build it with?
Starting total with Claude Code~$99 one-time
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 Opal
$8.29/mo (Pro Yearly)
Your time to build
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)
Vibe code Opal: FAQ
- Can you vibe code Opal yourself?
- Serious undertaking — 38/100 vibecodeable. 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.
- How long does it take to vibe code Opal?
- 3 to 4 months of part-time native development — roughly 45-60 hours of hands-on time with an AI coding agent.
- How do you build your own Opal?
- Scoped to personal use: SwiftUI on the front, Node.js with Express behind it, Turso (SQLite at the edge) 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 Opal without being an expert?
- Use an AI coding tool (Claude Code or Cursor or GitHub) and work in small steps: scaffold, data model, core screens, then deploy. Realistic effort: 3 to 4 months of part-time native development. The prompts on this page are written so the AI does the heavy lifting.
- How much does it cost to vibe code Opal instead of paying?
- About ~$119 one-time to start and $0/mo to run, versus $8.29/mo (Pro Yearly) for Opal. Break-even: 15 months (factoring Apple developer fee and build time value).
- What stack should you use to vibe code Opal?
- SwiftUI; Node.js with Express; Turso (SQLite at the edge); plus Apple DeviceActivity Framework, Apple ManagedSettings Framework, NetworkExtension Framework.