fitbit-os-simulator ☆
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Description:
Build apps and clock faces for Fitbit
Type: Cask  |  Latest Version: 0.9.4@0  |  Tracked Since: Dec 17, 2025
Links: Homepage  |  @FitbitDev  |  formulae.brew.sh
Category: Developer tools
Tags: fitbit simulator wearables sdk development testing
Install: brew install --cask fitbit-os-simulator
About:
The Fitbit OS Simulator is an essential desktop tool for developers building applications and clock faces for Fitbit smartwatches. It provides a virtualized environment to preview and debug UI layouts and interactions without needing physical hardware. This accelerates the development workflow by enabling rapid iteration and testing directly on a macOS machine.
Key Features:
  • Interactive device simulation for various Fitbit models
  • Live preview of UI changes and app behavior
  • Integrated debugging and performance monitoring tools
  • Support for testing JavaScript-based applications and clock faces
Use Cases:
  • Developing and prototyping new Fitbit applications and watch faces
  • Debugging UI issues and performance bottlenecks in Fitbit OS apps
  • Learning Fitbit OS development without purchasing physical hardware
Alternatives:
  • Physical Fitbit Device – Essential for final hardware testing and sensor validation, but less efficient for rapid UI iteration and debugging.
Version History
Detected Version Rev Change Commit
Jan 26, 2023 8:06pm 0.9.4 0 VERSION_BUMP cc0d40a0
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