# Mobile Guard vs Decibel Reader

The clearest difference is rating: Decibel Reader at 4.5 against Mobile Guard's 3.6. Mobile Guard's advantage is ads (none vs shown) and review sentiment (100% vs 80%). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. Mobile Guard sells 2 in-app purchases, starting at $9.99 per 7 days and Decibel Reader sells 6 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Decibel Reader holds the better App Store score, 4.5 against 3.6. Both are backed by a comparable volume of ratings — 23 and 24 respectively. Written reviews complicate that: 100% of Mobile Guard's written reviews are positive against 80% of Decibel Reader's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 8, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Mobile Guard | Decibel Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (23 ratings)](https://appshunter.io/ios/app/mobile-guard-security-checker/id6443829922/reviews) | **[4.5 (24 ratings)](https://appshunter.io/ios/app/decibel-reader/id6451411046/reviews)** |
| Number of ratings | 23 | **24** |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 26 MB | 12 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [iSolufy LLC](https://appshunter.io/developer/1674436938) | [Andy Sutanto](https://appshunter.io/developer/1659282966) |

## What reviewers say

### Mobile Guard

[App page](https://appshunter.io/ios/app/mobile-guard-security-checker/id6443829922)

This app helps protect your internet connection and personal information by alerting you to suspicious activity and preventing intrusions. It offers features like data breach checks, system security, ad blocking, and secure storage for photos and contacts.

**Highlights:** Data Breach Check, System Security, Secure AdBlock, Secret Photo Vault, Private Contact Storage, Cybersecurity Advices

**Features:** Safari Extension, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access Weekly | $9.99 | per 7 days |
| Premium Access | $79.99 | per year |


### Decibel Reader

[App page](https://appshunter.io/ios/app/decibel-reader/id6451411046)

Measure ambient noise levels with real-time readings, tracking minimum, average, and maximum decibels. Offers calibration for accuracy and a dark mode for comfortable viewing. This tool helps you understand your sound environment.

**Highlights:** Real-time decibel measurement, Calibration for accuracy, Track min, average, and max noise levels, Dark mode for low-light use, Simple and intuitive interface

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decibel Meter Pro - 1 Week | $3.99 | per 7 days |
| Decibel Meter Pro - 1 Month | $7.99 | per month |
| Sound Level Meter - 6 Months | $19.99 | per 6 months |
| Noise Level Meter - 1 Year | $29.99 | per year |
| Decibel Meter Pro - 1Y 2 | $29.99 | per year |
| dB Meter Pro | $49.99 | one-time |


## Frequently asked questions

### Is Mobile Guard free?

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

### Is Decibel Reader free?

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

### Which has better reviews, Mobile Guard or Decibel Reader?

Decibel Reader is rated higher. Mobile Guard averages 3.6 out of 5 from 23 ratings, while Decibel Reader averages 4.5 from 24 ratings.

### Do Mobile Guard or Decibel Reader have ads?

Decibel Reader shows ads; Mobile Guard does not.

### Which is updated more often, Mobile Guard or Decibel Reader?

Mobile Guard ships an update every 2 weeks, and Decibel Reader every 2 weeks. Most recently, Mobile Guard was updated on September 8, 2026 and Decibel Reader on September 18, 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.*