# ATS MQTT Client vs Bluetooth Serial Connect

The clearest difference is rating: Bluetooth Serial Connect at 3.7 against ATS MQTT Client's 3.0. Bluetooth Serial Connect also leads on ratings volume (7 vs 2). ATS MQTT Client's advantage is ads (none vs shown) and iOS requirement (13.0 vs 16.2). On price, review sentiment, update cadence 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.

Bluetooth Serial Connect holds the better App Store score, 3.7 against 3.0. Both are backed by a comparable volume of ratings — 2 and 7 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

ATS MQTT Client ships an update every 7 months, Bluetooth Serial Connect every 10 months. The most recent releases landed on September 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ATS MQTT Client | Bluetooth Serial Connect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/ats-mqtt-client/id1485411018/reviews) | **[3.7 (7 ratings)](https://appshunter.io/ios/app/bluetooth-serial-connect/id6449396821/reviews)** |
| Number of ratings | 2 | **7** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 7 months** | Every 10 months |
| Monetization | Free | Free |
| Size | 5 MB | 24 MB |
| Requires iOS | **13.0** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ATS sp.j.](https://appshunter.io/developer/1485411017) | [Henry Abrahamsen](https://appshunter.io/developer/1544660671) |

## What reviewers say

### ATS MQTT Client

[App page](https://appshunter.io/ios/app/ats-mqtt-client/id1485411018)

Monitor and control devices connected to the mqtt.ats.pl service in real-time. Sign in with your account to access all your registered devices directly within the application.

**Highlights:** Real-time device monitoring, Device control, Integration with mqtt.ats.pl service, Account sign-in for device access, Supports iPhone, iPad, and iPod

**Features:** macOS Compatibility

**In-app purchases:** none


### Bluetooth Serial Connect

[App page](https://appshunter.io/ios/app/bluetooth-serial-connect/id6449396821)

Control your Arduino projects with your phone. Design custom interfaces with buttons, joysticks, and displays to send and receive data via Bluetooth low-energy modules. An integrated library simplifies the connection process.

**Highlights:** Customizable control boards, Button and joystick inputs, Display integration, Bluetooth low-energy module support, Arduino library for easy integration

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

**In-app purchases:** none


## Frequently asked questions

### Is ATS MQTT Client free?

ATS MQTT Client is free to download, with no in-app purchases.

### Is Bluetooth Serial Connect free?

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

### Which has better reviews, ATS MQTT Client or Bluetooth Serial Connect?

Bluetooth Serial Connect is rated higher. ATS MQTT Client averages 3.0 out of 5 from 2 ratings, while Bluetooth Serial Connect averages 3.7 from 7 ratings.

### Do ATS MQTT Client or Bluetooth Serial Connect have ads?

Bluetooth Serial Connect shows ads; ATS MQTT Client does not.

### Which is updated more often, ATS MQTT Client or Bluetooth Serial Connect?

ATS MQTT Client ships an update every 7 months, and Bluetooth Serial Connect every 10 months. Most recently, ATS MQTT Client was updated on September 25, 2026 and Bluetooth Serial Connect on October 24, 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.*