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Projects

Flipper: A Beginner-Friendly Development Framework for Custom Flipper Zero Apps & Scripts

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Introduction

The repository named Flipper is not a Flipper Zero application or custom firmware. Instead, it is a thoughtfully designed development framework and starter kit that helps users quickly build their own applications and scripts for the Flipper Zero running Momentum Firmware.

It lowers the barrier to entry by offering two development paths: easy JavaScript scripting (possible entirely from a phone) and more powerful native C applications.

What is the Flipper Repository?

This project provides templates, examples, documentation, and tooling to create custom Flipper Zero apps and scripts. It is specifically built against the Momentum Firmware SDK and includes:

  • Ready-to-use JavaScript script templates
  • C application templates (including GUI examples)
  • A real-world example Sub-GHz remote control
  • Clear deployment instructions for both JS and .fap files
  • Integration notes for tools like Flipper GUI Studio

The goal is to make custom development on Flipper Zero more accessible, especially for beginners and mobile-first developers.

Key Features

  • Dual Development Support — JavaScript (phone-friendly) and C (native performance)
  • Phone-Only Workflow — Edit and deploy JavaScript scripts directly from your phone using the Flipper Mobile App (no computer required)
  • Templates & Examples — Includes basic scripts, Sub-GHz remote examples, and GUI app starters
  • Hot Reload for JS — No compilation step — simply update the .js file on the device
  • C App Support — Full native .fap development with uFBT and optional GUI Studio integration
  • Documentation & Tooling — JS API reference, deployment guides, CI/CD automation, and weekly SDK sync
  • Privacy & Simplicity — No accounts, no telemetry — everything runs locally on your device and computer

JavaScript vs C Development Paths

JavaScript Path (Recommended for Beginners)

  • Write scripts in any text editor (even on your phone)
  • No compilation needed
  • Deploy via Flipper Mobile App over Bluetooth
  • Ideal for quick tools, Sub-GHz remotes, and simple automations
  • Hot-reload workflow makes iteration very fast

C Path (For More Advanced Use Cases)

  • Build native .fap applications
  • Full access to hardware and higher performance
  • Use uFBT (Micro Flipper Build Tool) or GitHub Codespaces
  • Optional drag-and-drop GUI design with Flipper GUI Studio

Both paths deploy files to the SD card (/ext/apps/Scripts/ for JS and /ext/apps/<Category>/ for .fap files).

Key Takeaways

  • The Flipper repository is a development framework, not an app or firmware itself.
  • It makes creating custom tools for Flipper Zero (Momentum Firmware) significantly more accessible.
  • JavaScript development can be done entirely from a phone with no computer required.
  • C development is supported for more advanced or performance-sensitive applications.
  • Includes practical examples (like Sub-GHz remotes), good documentation, and modern tooling (CI, GUI Studio integration).
  • Ideal for hobbyists, tinkerers, and anyone wanting to extend their Flipper Zero without starting from scratch.

Conclusion

The Flipper repository stands out as one of the more approachable ways to start developing for the Flipper Zero. By offering both a simple JavaScript path (phone-friendly) and a full C path, it caters to a wide range of users — from complete beginners to more experienced embedded developers.

If you own a Flipper Zero running Momentum Firmware and want to build your own tools, scripts, or applications, this framework is an excellent place to begin.

Repository: https://github.com/Ranzlappen/Flipper

Sources

  • Flipper GitHub Repository (README, templates, and documentation)
  • Project structure and deployment guides (June 2026)

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