# OpenText Self Declaration vs CJDecibel

The clearest difference is review sentiment: CJDecibel at 100% against OpenText Self Declaration's 0%. OpenText Self Declaration's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, 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.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | OpenText Self Declaration | 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 | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Weekly | Weekly |
| Monetization | **Free** | Ad-supported |
| Size | 53 MB | 37 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OpenText](https://appshunter.io/developer/415355796) | [炽金 练](https://appshunter.io/developer/1523269489) |

## What reviewers say

### OpenText Self Declaration

[App page](https://appshunter.io/ios/app/opentext-self-declaration/id1519996748)

Prepare your self-declaration in advance or on the spot to save time upon arrival at the office. Generate a quick entry card for seamless verification at the entry gate. This secure app is designed for employees, partners, and contractors needing office access.

**Highlights:** Prepare declarations in advance, Generate on-the-spot declarations, Create quick entry cards, Secure data storage within the app, Streamlined office entry verification

**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 OpenText Self Declaration free?

OpenText Self Declaration is free to download, with no in-app purchases.

### Is CJDecibel free?

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

### Do OpenText Self Declaration or CJDecibel have ads?

CJDecibel shows ads; OpenText Self Declaration does not.

### Which is updated more often, OpenText Self Declaration or CJDecibel?

OpenText Self Declaration ships an update weekly, and CJDecibel weekly. Most recently, OpenText Self Declaration was updated on October 12, 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.*