# Loudly vs NoiseAlert

The clearest difference is in-app purchases: NoiseAlert at none against Loudly's 1. NoiseAlert also leads on iOS requirement (17.0 vs 26.0). Loudly's advantage is update cadence (every 4 days vs every 11 days). On price, ads and device support there is nothing between them.

Both are free to download. Loudly sells 1 one-off in-app purchase. NoiseAlert asks for nothing beyond the download.

Loudly ships an update every 4 days, NoiseAlert every 11 days. The most recent releases landed on October 31, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Loudly | NoiseAlert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/loudly-decibel-meter-db/id6759638121/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 11 days |
| Monetization | Free with in-app purchases | — |
| Size | 3 MB | 6 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Pragmatiq](https://appshunter.io/developer/1620893651) | [satoshi amasaki](https://appshunter.io/developer/1891268722) |

## What reviewers say

### Loudly

[App page](https://appshunter.io/ios/app/loudly-decibel-meter-db/id6759638121)

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.

**Highlights:** Real-time decibel measurements, IEC 61672 compliant audio engine, A-weighting and C-weighting filters, Fast, Slow, and Impulse time weighting, Calibration controls, Min/Max/Average statistics (Pro), Session history (Pro)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Loudly Pro | $2.99 | one-time |


### NoiseAlert

[App page](https://appshunter.io/ios/app/noisealert/id6762494482)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Loudly free?

Loudly is free to download, with in-app purchases available.

### Is NoiseAlert free?

NoiseAlert is free to download, with no in-app purchases.

### Do Loudly or NoiseAlert have ads?

Neither Loudly nor NoiseAlert shows ads.

### Which is updated more often, Loudly or NoiseAlert?

Loudly ships an update every 4 days, and NoiseAlert every 11 days. Most recently, Loudly was updated on October 31, 2026 and NoiseAlert on November 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*