# ST vs Decibel Meter

The clearest difference is in-app purchases: ST at none against Decibel Meter's 2. ST also leads on iOS requirement (11.0 vs 13.0). Decibel Meter's advantage is update cadence (every 3 weeks vs every 39 months). On price, ads and device support there is nothing between them.

Both are free to download. Decibel Meter sells 2 in-app purchases, starting at $4.99 per month. ST asks for nothing beyond the download.

ST ships an update every 39 months, Decibel Meter every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | ST | Decibel Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (10 ratings)](https://appshunter.io/ios/app/decibel-meter-sound-analyzer/id6482288270/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 10 MB | 32 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Globalsat Technology Corporation.](https://appshunter.io/developer/624997558) | [Bustgrow Ltd](https://appshunter.io/developer/1729557461) |

## What reviewers say

### ST

[App page](https://appshunter.io/ios/app/st-20/id1494673055)

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

**In-app purchases:** none


### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-sound-analyzer/id6482288270)

Measure and understand ambient noise levels with this intuitive tool. It provides instant decibel readings, logs historical data with notes, and offers visual and auditory representations of sound. Ideal for ensuring safety, monitoring environments, or protecting hearing.

**Highlights:** Instant dB readings, Historical data logging, Add personal notes to recordings, Simple and intuitive interface, Real-time audio analysis, Visual and auditory sound representation

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $4.99 | per month |
| Premium Access | $39.99 | per year |


## Frequently asked questions

### Is ST free?

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

### Is Decibel Meter free?

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

### Do ST or Decibel Meter have ads?

Neither ST nor Decibel Meter shows ads.

### Which is updated more often, ST or Decibel Meter?

ST ships an update every 39 months, and Decibel Meter every 3 weeks. Most recently, ST was updated on November 3, 2026 and Decibel Meter 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.*