Radim's utils

Before you record, make sure the right microphone is live, the level is right, and your phone is ready — Radim's utils checks your whole recording setup in one place.

MICROPHONE
• Basic Audio Input — see which microphone iOS is using right now: built-in, USB, wired or Bluetooth.
• Advanced Audio Input — every available input, switching between them, a live level meter with peak hold and a clip counter, sample rate and latency, and a log of every plug, unplug and dropout.
• Test recording — record a few seconds, play it back and see the peak level, with a warning when it clipped or was too quiet. Built-in mics show which capsule was used (top, bottom, front, back).
• Don't switch input automatically — keep this app on your chosen mic when another one is connected.
• USB hub & devices — every USB audio device and camera that is connected.

VIDEO
• Camera — every lens with its focal length, aperture and zoom range; video formats with frame rates, 10-bit, HDR, Apple Log and ProRes support; photo capabilities; and a live camera window.

NETWORK
• Wi-Fi and Mobile Data — connection status, IP address, 5G / LTE per SIM, and live upload and download speed with graphs. Useful before streaming.

DEVICE
• Storage — free space on the device or an external drive, and a calculator for how many minutes of video fit in each format.
• Power — battery level, charging state and an estimated charge or drain rate over time.
• Thermal — the device's thermal state over time, so you know before the camera starts to throttle.
• Location — position, accuracy, altitude, speed, compass, and whether the location is simulated.

ALSO
• Tips & guides — short, practical how-tos for audio, video and streaming.
• Shortcuts and Siri actions — ask which microphone is active, or whether an external mic is connected, inside your own automations.
• Choose which tools appear, on iPhone and iPad, in portrait and landscape.

PRIVACY
Radim's utils collects no data, has no accounts, no ads and no tracking, and makes no network requests. Everything is read on your device and stays there.

Note: iOS doesn't give apps the device temperature, charging voltage or charging current, so Thermal shows Apple's thermal levels and Power shows estimates. An app can only choose the microphone for itself — other apps follow Settings › Sounds › Input, which Basic Audio Input explains.