# a vs MQTT Debug & Analyzer Client

The clearest difference is in-app purchases: a at none against MQTT Debug & Analyzer Client's 3. a also leads on review sentiment (78% vs 60%) and chart position (#21 vs unranked). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. MQTT Debug & Analyzer Client sells 3 in-app purchases, starting at $2.99 per month. a asks for nothing beyond the download.

a ships an update monthly, MQTT Debug & Analyzer Client every 3 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | a | MQTT Debug & Analyzer Client |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (568 ratings)](https://appshunter.io/ios/app/a-shell/id1473805438/reviews)** | — |
| Number of ratings | **568** | — |
| Positive reviews | **78.3% of reviews** | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Subscription |
| Best chart rank | **#21** | — |
| Size | 2.1 GB | 18 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Nicolas Holzschuch](https://appshunter.io/developer/1450994948) | [小玲 王](https://appshunter.io/developer/1573722736) |

## What reviewers say

### a

[App page](https://appshunter.io/ios/app/a-shell/id1473805438)

**Currently charting:** #21 Top Free · Developer Tools (US App Store)

This app provides a local Unix terminal emulator for iOS devices, enabling users to run various Unix commands, edit files, and process data. It includes support for multiple programming languages and network utilities, with integration for iOS Shortcuts and multi-window functionality.

**Highlights:** Local Unix terminal emulator, Run Unix commands, File transfer (scp, curl), Text editing (vim, ed), Programming languages (Python, Lua, C), Network utilities (ping, nslookup), iOS Shortcuts integration

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Powerful terminal with Linux commands
- 👍 Useful for programming and development
- 🔒 Secure and reliable
- 💡 Impressive capabilities for an iOS app
- 👍 Helpful documentation and developer support

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 🔍 Limited customization options
- 🔍 Missing some basic terminal features
- 🔍 Compatibility issues with certain packages

**Reported bugs**

- Toolbar buttons not accessible in portrait mode on some devices
- Pasting from clipboard can insert unexpected characters
- Sourcing certain script files causes crashes

**Requested features**

- Add support for package managers like Homebrew or APT
- Implement more advanced shell features like job control and better tab completion
- Integrate Git for version control
- Allow installing additional packages and libraries
- Improve clipboard and file management integration


### MQTT Debug & Analyzer Client

[App page](https://appshunter.io/ios/app/mqtt-debug-and-analyzer-client/id6759897721)

This utility helps IoT developers and network engineers debug, monitor, and analyze MQTT traffic. It offers advanced connectivity, full MQTT 5.0 support, and intuitive data visualization tools. Seamlessly integrates with major IoT platforms.

**Highlights:** Advanced connectivity (TCP, WebSockets, SSL/TLS), MQTT 5.0 protocol support, Syntax highlighting for JSON, XML, text, Hex view for binary data, Real-time charts for numerical payloads, Chat-style message history, Broker compatibility with major platforms

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MQTT Month Pro | $2.99 | per month |
| MQTT Yearly Pro | $4.99 | per year |
| MQTT Lifetime Pro | $5.99 | one-time |


## Frequently asked questions

### Is a free?

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

### Is MQTT Debug & Analyzer Client free?

MQTT Debug & Analyzer Client is free to download, with in-app purchases available.

### Do a or MQTT Debug & Analyzer Client have ads?

Neither a nor MQTT Debug & Analyzer Client shows ads.

### Which is updated more often, a or MQTT Debug & Analyzer Client?

a ships an update monthly, and MQTT Debug & Analyzer Client every 3 weeks. Most recently, a was updated on November 3, 2026 and MQTT Debug & Analyzer Client on November 5, 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.*