# ATS MQTT Client vs Trombone Level

The clearest difference is ads: ATS MQTT Client at none against Trombone Level's shown. ATS MQTT Client also leads on iOS requirement (13.0 vs 15.0). Trombone Level's advantage is update cadence (every 2 weeks vs every 7 months). On price, 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.

ATS MQTT Client ships an update every 7 months, Trombone Level every 2 weeks. The most recent releases landed on September 25, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | ATS MQTT Client | Trombone Level |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/ats-mqtt-client/id1485411018/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 5 MB | 40 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ATS sp.j.](https://appshunter.io/developer/1485411017) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## 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


### Trombone Level

[App page](https://appshunter.io/ios/app/trombone-level/id6748576970)

**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 Trombone Level free?

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

### Do ATS MQTT Client or Trombone Level have ads?

Trombone Level shows ads; ATS MQTT Client does not.

### Which is updated more often, ATS MQTT Client or Trombone Level?

ATS MQTT Client ships an update every 7 months, and Trombone Level every 2 weeks. Most recently, ATS MQTT Client was updated on September 25, 2026 and Trombone Level on October 15, 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.*