# Bluetooth Toolkit vs Simple Spectrogram

The clearest difference is iOS requirement: Bluetooth Toolkit at 13.0 against Simple Spectrogram's 17.0. On price, ads, in-app purchases and device support 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 | Bluetooth Toolkit | Simple Spectrogram |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/simple-spectrogram/id6823407210/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | — |
| Monetization | — | Free |
| Size | 19 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DaWei Chou](https://appshunter.io/developer/979936610) | [DANIEL LAWRENCE LU](https://appshunter.io/developer/6823407212) |

## What reviewers say

### Bluetooth Toolkit

[App page](https://appshunter.io/ios/app/bluetooth-toolkit/id6742171850)

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Spectrogram

[App page](https://appshunter.io/ios/app/simple-spectrogram/id6823407210)

Visualize sound frequencies in real-time with a dynamic spectrogram. Analyze audio, identify musical notes, and adjust display settings for detailed sound inspection. Audio processing is done entirely on-device, ensuring privacy.

**Highlights:** Real-time spectrogram visualization, Logarithmic frequency scale, Identify musical notes and frequencies, Pause and inspect audio slices, Adjustable frequency range and contrast, Portrait and landscape support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Bluetooth Toolkit free?

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

### Is Simple Spectrogram free?

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

### Do Bluetooth Toolkit or Simple Spectrogram have ads?

Neither Bluetooth Toolkit nor Simple Spectrogram shows ads.

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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.*