# Decibel X vs Cuspart

The clearest difference is ads: Decibel X at none against Cuspart's shown. Decibel X also leads on device support (3 vs 1). On price, update cadence, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Decibel X sells 5 in-app purchases, starting at $1.99 per 7 days and Cuspart sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Decibel X ships an update every 3 months, Cuspart every 2 months. The most recent releases landed on November 12, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Decibel X | Cuspart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (164K ratings)](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923/reviews)** | — |
| Number of ratings | **164K** | — |
| Positive reviews | 66.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Freemium | — |
| Size | 90 MB | 79 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [SkyPaw Co., Limited](https://appshunter.io/developer/1842040687) | [Mustafa Tolga DALBUDAK](https://appshunter.io/developer/1479052908) |

## What reviewers say

### Decibel X

[App page](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923)

This tool transforms your device into a professional sound level meter, offering precise measurements of ambient noise. It features advanced calibration, frequency analysis, and data management for various applications, from personal curiosity to professional use.

**Highlights:** Pre-calibrated sound pressure level (SPL) measurements, Frequency weighting filters (dBA, dBC, ITU-R 468), Apple Watch and Health App integration, History data management with export options, Dosimeter with NIOSH, OSHA standards, FFT and BAR graphs for real-time frequency analysis, InstaDecibel for sharing dB reports on photos

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Membership | $1.99 | per 7 days |
| Monthly Membership | $5.99 | per month |
| Annual Membership | $49.99 | per year |
| ITU-R 468, A, B, C Weightings | $1.99 | one-time |
| Data Export | $2.99 | one-time |

**What reviewers like**

- ⭐ Excellent app
- 👍 Easy to use and understand
- 🔍 Useful for various applications
- 🎓 Helpful for hearing protection
- 🔧 Accurate and reliable

**What reviewers complain about**

- 💰 Expensive subscription model
- 🔒 Misleading free trial
- 📢 Intrusive ads
- 🤖 Inaccurate readings compared to professional meters
- 🤔 Confusing interface

**Reported bugs**

- App crashes when deleting recordings
- Microphone issues on certain devices
- Saved files not accessible after updates

**Requested features**

- Add GPS coordinates to recordings
- Improve reporting and data export
- Provide more weighting options
- Extend frequency range
- Allow music playback while using the app


### Cuspart

[App page](https://appshunter.io/ios/app/cuspart-db-meter/id6477875540)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro | $0.99 | one-time |
| Espresso | $1.49 | one-time |
| Flat White | $1.99 | one-time |
| Caffè Americano | $2.49 | one-time |
| Caffè Mocha | $2.99 | one-time |
| Classic Hot Chocolate | $3.49 | one-time |
| Special Hot Chocolate | $3.99 | one-time |


## Frequently asked questions

### Is Decibel X free?

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

### Is Cuspart free?

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

### Do Decibel X or Cuspart have ads?

Cuspart shows ads; Decibel X does not.

### Which is updated more often, Decibel X or Cuspart?

Decibel X ships an update every 3 months, and Cuspart every 2 months. Most recently, Decibel X was updated on November 12, 2026 and Cuspart on November 4, 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.*