The field box, rebuilt for your pocket. What the Q Box and dB Box were to a generation of techs, now a whole bench of AV, RF & broadcast tools on your iPhone.
Signal generation, phase & loudness metering, input levels, SMPTE/LTC, RF coordination and searchable gear directories, built by a working show tech, for working show techs.
Now on the App Store · iPhone · iOS 17+
A live look at five of the audio tools, the same screens you'll be staring at on a load-in. Swipe through.
Waveform
Frequency
Level
Signal GeneratorSine, pink, white & log sweep. The standard for ringing out a PA.
Phase correlation
Input levels
Phase CorrelationConsole feed vs. mic on two channels. Catch a polarity flip before it cancels.
Integrated (gated)
Live
Target
Loudness (LUFS)EBU R128 / BS.1770: momentary, short-term and gated integrated against your target.
Input level
Estimated analog level
Input Level TesterIncoming dBFS & dBu, true peak, peak hold and clip, calibrated to your interface's reference.
Timecode
Frame rate
SMPTE / LTCGenerate & read longitudinal timecode at 24, 25, 29.97DF and 30 fps.
From a quick wavelength check to a full coordination plot with intermod checks. Most of it works fully offline, anywhere on site.
Every calculator, the RF tools and the gear directories run standalone on any iPhone. No hardware, no signal, no internet required.
The measurement tools (RTA, transfer function, phase correlation, loudness and input level) do their real work with a small 2-channel USB-C or Lightning interface. Feed a console output into Ch 1 (reference) and a measurement mic into Ch 2, and you've got a transfer-function rig in your bag.