# Sound Meter (Decibel) vs Call Shield

The clearest difference is in-app purchases: Sound Meter (Decibel) at none against Call Shield's 3. Sound Meter (Decibel) also leads on device support (4 vs 1) and iOS requirement (14.1 vs 17.0). Call Shield's advantage is update cadence (weekly vs every 5 months). On price and ads there is nothing between them.

Both are free to download. Call Shield sells 3 in-app purchases, starting at $2.99 per 7 days. Sound Meter (Decibel) asks for nothing beyond the download.

Sound Meter (Decibel) ships an update every 5 months, Call Shield weekly. Both last shipped on November 12, 2026.

## The numbers

| Metric | Sound Meter (Decibel) | Call Shield |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (3.3K ratings)](https://appshunter.io/ios/app/sound-meter-decibel/id1626613141/reviews)** | — |
| Number of ratings | **3.3K** | — |
| Positive reviews | 50.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 8 MB | 6 MB |
| Requires iOS | **14.1** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [UniCom Technology](https://appshunter.io/developer/1270764210) | [enes ozer](https://appshunter.io/developer/1879277767) |

## What reviewers say

### Sound Meter (Decibel)

[App page](https://appshunter.io/ios/app/sound-meter-decibel/id1626613141)

This application measures and displays environmental noise levels in decibels. It offers various visual representations of the data, including gauges, graphs, and numerical readouts. Users can also save their measurement history.

**Highlights:** Measures decibel values, Displays noise reference, Shows min/avg/max dB, Graphical decibel display, Saves measurement records

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Works perfectly
- 👍 Easy to use and free
- 👍 Good simple UI
- 👍 Good basic sound level meter
- 👍 Very easy and simplified display

**What reviewers complain about**

- 🐛 Spelling mistake ('quiet' spelled as 'quite')
- 🐛 Inaccurate readings compared to other apps
- 🐛 Requires a subscription for basic recording
- 🐛 Imprecise metering, not a reliable tool
- 🐛 Doesn't work in split screen

**Reported bugs**

- Apple security alert displayed on a Google ad
- Readings are half of other apps
- Misspelled 'quiet' throughout the app

**Requested features**

- Add option to prevent screen timeout
- Add landscape mode
- Improve accuracy and calibration


### Call Shield

[App page](https://appshunter.io/ios/app/call-shield/id6793571891)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CallShield Pro Weekly | $2.99 | per 7 days |
| CallShield Pro Monthly | $9.99 | per month |
| CallShield Pro Yearly | $99.99 | per year |


## Frequently asked questions

### Is Sound Meter (Decibel) free?

Sound Meter (Decibel) is free to download, with no in-app purchases.

### Is Call Shield free?

Call Shield is free to download, with in-app purchases available.

### Do Sound Meter (Decibel) or Call Shield have ads?

Both Sound Meter (Decibel) and Call Shield show ads.

### Which is updated more often, Sound Meter (Decibel) or Call Shield?

Sound Meter (Decibel) ships an update every 5 months, and Call Shield weekly. Most recently, Sound Meter (Decibel) was updated on November 12, 2026 and Call Shield on November 12, 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.*