Support

iPhone and iPad running iOS 26 or iPadOS 26 and later, in the United States. There’s no Android app yet.

No. There’s no sign-in, and your settings and calibrations stay on your device.

Not yet. The app shows the live level and up to the last 30 minutes on the graph, but it doesn’t save or export sessions.

Pro is a one-time purchase, not a subscription. It removes the ads and lets you calibrate any device against your own reference meter.

Many meter apps let iOS adjust the microphone’s gain and filter out background noise, which pulls loud readings down. This app asks for Apple’s measurement mode, which turns that processing off.

Readings also differ when apps use different weightings or response speeds. Compare apps set to the same weighting (dBA or dBC) and the same response (Fast or Slow).

There’s no built-in profile for your device model yet, or your own calibration missed ±2 dB at one of its levels. The meter still works, but readings can be off by a few decibels.

You can calibrate your device yourself against a reference sound level meter, and share the calibration with us so other owners of the same model benefit.

The device’s built-in microphone. AirPods and other headsets process sound in ways that defeat accurate measurement, so the app warns you when one is connected.

Keep the microphone uncovered. A case with open microphone holes is fine; a case whose edge covers them is not.

Use dBA. Hearing-safety limits and most venue targets are set in dBA. Turn on Show dBC Reading in Settings to see a second reading that includes more of the bass, which helps when the low end feels heavy.

Fast reacts right away. Slow smooths the reading so it’s easier to follow while mixing. Both follow the IEC 61672-1 standard, so set a reference meter the same way when you compare.

The band shows where the room has mostly been over the last 30 seconds: from the level it stayed above 90% of the time to the level it passed only 10% of the time. A single loud moment barely moves it.

The tick holds the loudest recent peak for 2 seconds, then falls back to the top of the band.

Target Range alerts follow the 5-second average, not the live reading, so a moment of feedback doesn’t set them off. The border changes once the room has been out of range for long enough to move the average.

You need a reference sound level meter set to A weighting and Slow, and a sound system that can play the test noise the app links to. In Settings, open Calibration and tap Start Calibration Session.

The app walks you through each level: play the noise until your meter reads the level, hold the device beside the meter, and tap Calibrate. At the end, tap Use This Calibration to apply it.

After a calibration session, tap Share Calibration and send it with any email app to contact@bitwiseforge.com. It attaches the profile and a spreadsheet of your measurements.

Only the calibration is shared: your device model, iOS version, the readings, the meter you described, and the test noise you played. The app shows you everything in the files before you send them. No audio and no location. Profiles we accept ship in a later update.

No. The app measures sound level on your device as it listens. Audio is never saved or sent anywhere. See the privacy policy for details.