# Decibel Meter X vs BigWrite Text Box

The clearest difference is in-app purchases: BigWrite Text Box at none against Decibel Meter X's 3. BigWrite Text Box also leads on iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Decibel Meter X sells 3 in-app purchases, starting at $1.99 per month. BigWrite Text Box asks for nothing beyond the download.

## The numbers

| Metric | Decibel Meter X | BigWrite Text Box |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/decibel-meter-x-sound-level/id6758970624/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Monetization | Freemium | — |
| Size | 7 MB | 8 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [永刚 陈](https://appshunter.io/developer/1289220847) | [David Johnson](https://appshunter.io/developer/1783793867) |

## What reviewers say

### Decibel Meter X

[App page](https://appshunter.io/ios/app/decibel-meter-x-sound-level/id6758970624)

Transform your iPhone into a precise sound level meter for noise analysis and evidence recording. Features include real-time spectrum analysis, noise exposure tracking, and professional PDF reporting. Ideal for environmental checks, workplace safety, and dispute resolution.

**Highlights:** Multiple weighting modes (A/B/C/Z, ITU-R 468), Real-time FFT spectrum analysis (20Hz–20kHz), Noise exposure tracking (OSHA/NIOSH Dose/TWA), Background recording for evidence, Auto-pause recording below threshold, iCloud sync for measurements and recordings, Professional PDF report export

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $1.99 | per month |
| Pro | $14.99 | per year |
| Pro | $29.99 | one-time |


### BigWrite Text Box

[App page](https://appshunter.io/ios/app/bigwrite-text-box/id6759523810)

**Features:** macOS Compatibility, Safari Extension

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter X free?

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

### Is BigWrite Text Box free?

BigWrite Text Box is free to download, with no in-app purchases.

### Do Decibel Meter X or BigWrite Text Box have ads?

Neither Decibel Meter X nor BigWrite Text Box shows ads.

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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.*