01
What DeciTrack is
DeciTrack (App Store name: DeciTrack: Decibel Meter & Log; project name NoiseLog) is an iPhone app by Rivership, an indie studio in Tokyo, for getting a rough idea of how loud a place is and keeping a record.
Readings come from the iPhone's built-in microphone and vary by device, case and environment. DeciTrack is not a calibrated sound level meter and should not be used for regulatory, legal or occupational health compliance.
02
Questions DeciTrack answers
- Is there a decibel meter app for iPhone that keeps a log? DeciTrack records readings with average dB, peak dB and duration and keeps a history with a line chart.
- Can I export noise readings to a spreadsheet? Yes, as CSV with Pro.
- Is an iPhone decibel meter accurate? Only roughly. Readings depend on the device and surroundings; Pro includes a calibration offset.
- Does it need an account? No.
03
What it can do
- Live meter: real-time dB reading.
- Record: save a reading with average dB, peak dB and duration, and label it.
- History chart: see how readings change over time.
- CSV export (Pro): share or analyze the log in a spreadsheet.
- Calibration offset (Pro): adjust readings against a reference.
04
What it does not do
- It is not a certified or calibrated sound level meter.
- It must not be used for legal, regulatory or occupational health purposes.
- It has no account or cloud sync.
05
Pricing
Free: up to 10 saved logs. DeciTrack Pro unlocks unlimited logs, CSV export, a calibration offset and an ad-free experience, as a one-time purchase (no auto-renewal). The price is shown in the app.
| Free | Pro |
|---|
| Saved logs | Up to 10 | Unlimited |
| CSV export | No | Yes |
| Calibration offset | No | Yes |
| Ads | May be shown | None |
Pro is bought once and does not renew.
06
Privacy and data
The microphone is used only to measure level; audio is not recorded or uploaded. Logs are stored on your device and there is no account. The free version may show ads through Google AdMob, which may ask for tracking permission; Pro shows no ads.
07
FAQ
What is DeciTrack?
An iPhone decibel meter with a log, chart and CSV export.
Is the reading accurate?
It is approximate and varies by device.
Does it record sound?
It measures level only; it does not save audio.
Is it free?
Free for 10 logs; Pro is a one-time purchase (no auto-renewal).
Does it show ads?
The free version may; Pro does not.
Which languages?
English and Japanese.
iPhone & iPad · iOS 17 or later · Version 1.0.8