# Sound Meter vs SecureSync Notes

The clearest difference is price: Sound Meter at Free against SecureSync Notes's $4.00. Sound Meter also leads on iOS requirement (15.0 vs 18.0). SecureSync Notes's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support there is nothing between them.

Sound Meter is free to download; SecureSync Notes costs $4.00 up front. Sound Meter sells 3 in-app purchases, starting at $1.99 per month. SecureSync Notes asks for nothing beyond the download.

Sound Meter ships an update every 6 weeks, SecureSync Notes every 9 days. The most recent releases landed on September 27, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Sound Meter | SecureSync Notes |
| --- | --- | --- |
| Price | **Free** | $4.00 |
| Rating | **[4.3 (29 ratings)](https://appshunter.io/ios/app/sound-meter-decibel-pro/id1603557612/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 46.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 2 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Coocent Ltd.](https://appshunter.io/developer/942889525) | [THABO ALEJANDRO B GRIFFITHS](https://appshunter.io/developer/1824488763) |

## What reviewers say

### Sound Meter

[App page](https://appshunter.io/ios/app/sound-meter-decibel-pro/id1603557612)

Measure environmental noise levels in decibels (dB) with this tool. It helps identify noise pollution, monitor sound levels, and protect your hearing by setting decibel warnings. Record noise, take photos, and create videos of decibel readings.

**Highlights:** Measure environmental noise in decibels (dB), Evaluate average and maximum decibel values, Display decibel levels in gauge and graph, Record sound levels with photos and videos, Set decibel warnings for hearing protection, Calibrate for accuracy, Multiple themes

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sound meter premium - monthly | $1.99 | per month |
| Sound meter premium - yearly | $9.99 | per year |
| Sound meter premium- permanent | $12.99 | one-time |


### SecureSync Notes

[App page](https://appshunter.io/ios/app/securesync-notes/id6749000903)

**In-app purchases:** none


## Frequently asked questions

### Is Sound Meter free?

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

### Is SecureSync Notes free?

SecureSync Notes costs $4.00, with no in-app purchases.

### Do Sound Meter or SecureSync Notes have ads?

Sound Meter shows ads; SecureSync Notes does not.

### Which is updated more often, Sound Meter or SecureSync Notes?

Sound Meter ships an update every 6 weeks, and SecureSync Notes every 9 days. Most recently, Sound Meter was updated on September 27, 2026 and SecureSync Notes on September 14, 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.*