Loudly: Decibel Meter dB
Sound Level Meter & Noise dBA
About
Transform your iPhone into a precise sound level meter. It measures noise in real-time with a clear visual display and offers professional features for various uses, from monitoring baby rooms to protecting your hearing. All processing is done on-device with no data collection.
What's New in Loudly
1.4.1
June 16, 2026
Smoother Pro unlock flow with a quick confirmation step before checkout. Friendlier paywall timing — you get to take a few measurements first. Small reliability improvements under the hood.
MoreIn-App Purchases
$2.99
Loudly Pro
Unlock all features, forever.
Developer apps
FAQ
What is Loudly?
Loudly is a utility app that turns your iPhone into a professional-grade sound level meter. It provides real-time decibel readings with high accuracy and offers various professional features for monitoring noise levels.
Does Loudly have ads?
No, Loudly is completely ad-free. The developers prioritize user privacy and state that there are no ads or tracking within the application.
How much does Loudly cost?
The base application is free to download and use. Professional features, such as statistics, history, and export, can be unlocked with a one-time in-app purchase of $2.99.
What devices does Loudly support?
Loudly is currently supported on iPhone devices. It is designed to leverage the iPhone's microphone for accurate sound level measurements.
Is Loudly accurate?
Yes, Loudly uses an IEC 61672 compliant audio engine and offers features like A-weighting, C-weighting, and calibration controls to ensure professional-grade accuracy.
What are the Pro features in Loudly?
The Pro features, available via a one-time purchase, include Min/Max/Average statistics, session history to track measurements over time, peak alerts, Leq calculation, and the ability to export your readings.
How often is Loudly updated?
The latest version of Loudly is 1.4.1, and it was last updated on June 16, 2026. This indicates a relatively active development cycle for the application.
What is the age rating for Loudly?
Loudly has an age rating of 4+. This suggests that the content and features are suitable for users aged four and older.