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 to 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 intermod-safe coordination plot — 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 — come alive with a small-form-factor 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.