# ~Waves~ vs CJDecibel

The clearest difference is ads: ~Waves~ at none against CJDecibel's shown. CJDecibel's advantage is update cadence (weekly vs every 12 months) and iOS requirement (11.0 vs 13.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

~Waves~ ships an update every 12 months, CJDecibel weekly. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | ~Waves~ | CJDecibel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cjdecibel-noise-detection/id6479873232/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Weekly** |
| Monetization | — | Ad-supported |
| Size | 59 MB | 37 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sayantan Bera](https://appshunter.io/developer/1703442784) | [炽金 练](https://appshunter.io/developer/1523269489) |

## What reviewers say

### ~Waves~

[App page](https://appshunter.io/ios/app/waves/id6469730833)

**Features:** macOS Compatibility

**In-app purchases:** none


### CJDecibel

[App page](https://appshunter.io/ios/app/cjdecibel-noise-detection/id6479873232)

This utility app offers real-time, high-precision decibel measurements to detect noise levels. It features a minimalist interface for easy operation, allows recording of detection locations, and enables sharing or exporting of historical data.

**Highlights:** Real-time decibel measurement, High-precision detection, Location recording, Data sharing and export, Detection history viewing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ~Waves~ free?

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

### Is CJDecibel free?

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

### Do ~Waves~ or CJDecibel have ads?

CJDecibel shows ads; ~Waves~ does not.

### Which is updated more often, ~Waves~ or CJDecibel?

~Waves~ ships an update every 12 months, and CJDecibel weekly. Most recently, ~Waves~ was updated on October 5, 2026 and CJDecibel on October 3, 2026.

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