MIDI Host Herder

MIDI Host Herder turns your iPhone into a USB MIDI host and router. Plug a USB hub into your phone, connect your keyboards, pads, controllers and synths, and send MIDI between them. It does the job of a hardware MIDI host box.

ROUTING
• Send any input to any outputs, with as many routings as you like.
• Quick route: tap an input, then tap an output.
• Route everything to everything with one tap, like a MIDI thru box.
• Works with USB, Bluetooth MIDI, Network MIDI and other music apps on your phone.

FILTERS AND TRANSFORMS
Add these to each routing, in any order: message filter, channel filter, channel remap, key range for splits, velocity range for layers, transpose, note map for drum pads, velocity curve, controller remap, controller filter and clock divider.

CONTROLLER REMAP
Turn any knob, fader, pad, pitch bend or aftertouch into another control or a program change. Choose Direct, Latch, Increment or Relative mode. Use MIDI Learn: move a control instead of typing numbers.

CONDITIONS
A routing can pass MIDI only while a footswitch is held or a knob is above a value. The condition can come from any device.

CLOCK AND MONITOR
• An internal MIDI clock with tap tempo and BPM buttons, which also shows the tempo of incoming clock.
• A live, readable log of every message in and out, with filters and a hex view.

PRESETS
Save as many setups as you like. Everything saves automatically. Switch presets by tapping, by program change from your controller, or with a pad or footswitch. Send program changes and SysEx to your synths when a preset loads.

BUILT FOR THE STAGE
• A Panic button on every screen stops stuck notes the moment you touch it.
• If a routing is turned off or a keyboard is unplugged mid-chord, held notes are released.
• Devices appear as you plug them in, and routings reconnect by name.
• Routing keeps running in the background with the screen locked.

WHAT YOU NEED
An iPhone with iOS 17 or later, a USB hub (a powered one is best), a USB data cable, and class-compliant USB MIDI devices. Older iPhones with Lightning need Apple's Lightning to USB 3 Camera Adapter and a powered hub.

Free. No account, no ads, no in-app purchases and no tracking. Your settings and presets stay on your phone.