MidiFire is a modular MIDI effect host designed for flexible routing, processing, and monitoring of MIDI data. It allows users to freely arrange and connect MIDI ports and processing modules on an intuitive canvas, enabling the creation of both simple and complex MIDI setups. With features like panning, zooming, and scrolling, the workspace adapts to your workflow, supporting an unlimited number of ports and modules connected in series, parallel, or cascaded configurations.

The app includes essential MIDI processing tools such as filtering, transposing, remapping, and monitoring, along with a precise, remotely controllable MIDI clock. Users can save their configurations as scenes for easy recall and share them across devices or computers. Additional functionality is available through a free 'Scenes Club' offering special-purpose scenes to enhance your MIDI environment. MidiFire also supports Bluetooth MIDI connections and allows the creation of multiple virtual CoreMIDI ports to organize MIDI streams effectively.

A standout feature is the Stream Byter module, which enables custom MIDI processing through user-defined textual rules, including conditional statements, variables, mathematical functions, and timing controls. This module is compatible with legacy rules from previous versions, making transitions seamless. Specialized modules such as Tracking Clamp, Robotic Knob, and OSC Exchange extend capabilities for MIDI guitar tracking, complementary control changes, and OSC messaging. MidiFire supports all CoreMIDI hardware, network interfaces, virtual ports, and Bluetooth MIDI connections, making it a comprehensive tool for MIDI management.