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PWA vs Native macOS App - How to Decide for Your AI Tool

Fazm Team··2 min read
pwanative-appswiftuimacosarchitecture

The Fastest Path vs the Right Path

When you're building an AI tool for macOS, the first architectural decision is PWA or native. PWAs are fast to ship - wrap your web app, add a manifest, and you have something installable in a day. But the gap between a PWA and a native app is immediately noticeable on macOS.

PWAs can't access the accessibility API. They can't sit in the menu bar. They can't register global keyboard shortcuts. They can't send native notifications that integrate with Focus modes. For a basic dashboard or chat interface, these limitations don't matter. For an AI agent that needs to interact with the operating system, they're dealbreakers.

Where PWAs Work

If your AI tool is primarily a web interface - a chat window, a document editor, a dashboard - a PWA is perfectly fine. Users get an app icon in their dock, a standalone window, and decent offline support. The development cost is minimal if you already have a web app.

PWAs also make sense for cross-platform tools where macOS is one of several targets. Building native for every platform is expensive. A PWA gives you acceptable quality everywhere with one codebase.

Where Native Wins

AI agents that control your computer need deep OS integration. The accessibility API requires a native process with explicit user permission. Menu bar apps need AppKit or SwiftUI. System-level automation through AppleScript or Shortcuts integration requires native bindings.

SwiftUI on macOS has matured significantly. Building a menu bar app with a settings panel, a conversation view, and system integration takes days rather than weeks. The performance difference is noticeable too - native apps feel snappier, use less memory, and integrate with macOS features like Handoff and Spotlight.

The Practical Answer

Start with a PWA if you need to validate the idea quickly. Move to native SwiftUI when you need OS-level access, better performance, or a polished Mac experience. For AI agents specifically, you'll almost certainly end up native because the core functionality requires it.

Fazm is an open source macOS AI agent. Open source on GitHub.

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