# Central Telecom vs Sound Level & Spectrogram

The clearest difference is ads: Central Telecom at none against Sound Level & Spectrogram's shown. Central Telecom also leads on device support (3 vs 1) and iOS requirement (10.3 vs 18.7). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Central Telecom | Sound Level & Spectrogram |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | — | Every 5 months |
| Monetization | — | Ad-supported |
| Size | 64 MB | 4 MB |
| Requires iOS | **10.3** | 18.7 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Leonardo Icaro Souza Melo](https://appshunter.io/developer/1668851409) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## What reviewers say

### Central Telecom

[App page](https://appshunter.io/ios/app/central-telecom/id6446096281)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sound Level & Spectrogram

[App page](https://appshunter.io/ios/app/sound-level-and-spectrogram/id6503722682)

Measure sound levels in decibels and visualize sound frequencies with a real-time spectrogram. Understand your environment's noise and protect your health. Offers advanced settings for accurate acoustic analysis.

**Highlights:** Sound level measurement (dB), Real-time spectrogram analysis, Frequency weighting correction (A, C, Z), Time weighting characteristics (Fast, Slow), Time course graph, Environmental noise measurement

**In-app purchases:** none


## Frequently asked questions

### Is Central Telecom free?

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

### Is Sound Level & Spectrogram free?

Sound Level & Spectrogram is free to download, with no in-app purchases.

### Do Central Telecom or Sound Level & Spectrogram have ads?

Sound Level & Spectrogram shows ads; Central Telecom does not.

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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.*