Launching today

Duplex

Launching today

Run a second copy of any Mac app, with its own login

3 followers

Run a second copy of any Mac app, with its own login

3 followers

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Productivity

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Engineering & Development

Duplex clones Claude, Slack, Discord, or any Electron app into lightweight wrappers, each with its own login, settings, and Dock icon. Native Swift, notarized, first instance free.

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Launch tags:Mac•Productivity•Developer Tools

Launch Team / Built With

Maker

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Hi PH! I built Duplex because I needed two Claude accounts on one Mac and macOS flatly refuses: one instance per app. Duplex generates tiny wrapper apps (~200 KB) that launch any Electron app with an isolated profile, so each copy has its own login, settings, and Dock icon. The original app is never modified and keeps auto-updating. It's native Swift with zero dependencies, notarized by Apple, and source-available on GitHub. The first instance is free forever; a $5 license unlocks unlimited instances. Works with Claude, Slack, Discord, Signal, VS Code, anything Chromium-based. Ask me anything, especially about the macOS internals that made this weirder to build than it looks.

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2d ago