MQTTool vs MQTT Loupe
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MQTTool
This application serves as an MQTT client and testing tool. It allows users to connect to MQTT brokers, subscribe to message topics, and publish messages, making it ideal for IoT and machine-to-machine communication testing.
- MQTT client functionality
- Connect to authenticated brokers
- Connect to unauthenticated brokers
- Subscribe to topics
- Publish messages to topics
- IoT application testing
Read full descriptionHide full description
This is an MQTT client and test tool. MQTT is a machine-to-machine (M2M) messaging protocol commonly used for IoT applications. For more information on MQTT visit http://mqtt.org MQTTool can connect to authenticated and unauthenticated MQTT brokers, subscribe to topics, and publish messages to topics. I built this tool as i was doing my own MQTT investigations and I've posted it hoping others would find it useful too. I continue to use it on projects, and I'm continuing to look to improve this tool. If there are changes that would make this more useful, please send me feedback. Thanks!
MQTT Loupe
Inspect MQTT messages exchanged on a broker with this intuitive utility. Connect to brokers, subscribe to topics, and view message details. Features include JSON highlighting, hex viewer, and secure connection options.
- Inspect MQTT messages
- Connect to any MQTT broker
- Subscribe to topics
- Full-text search across topics
- JSON highlighting
- Hex viewer for binary payloads
- Secure connection options
Read full descriptionHide full description
MQTT Loupe is an intuitive utility to inspect MQTT messages exchanged on an MQTT broker. Connect to any public or local MQTT broker, subscribe to topics and view details of messages being transmitted. Don't remember that one message or topic? Fire up the search to find it instantly using full-text search through all topics, and results updating live with new hits appearing as they arrive. With built-in JSON highlighting, this app is perfect for monitoring Zigbee2Mqtt. And if you need to work with binary message payloads, the built-in hex viewer has you covered. Got frequently used topics that are further down the hierarchy? Make them favorites for easy and instant access. Concerned about security? Let the server's certificate be validated before connecting; you don't have to allow insecure connections based on untrusted certificates. Need more? Provide a client certificate to authenticate yourself against the server. All features in a nutshell: - clean and simple interface - hierarchical topic view - sidebar with history of recently opened topics - powerful full-text search capabilities across all topics and for a single message - search results are automatically updated when new messages arrive - extended message details, with proper formatting and syntax highlighting of JSON messages - support for binary message payloads, displayed as either ISO Latin-1 or in a hex view - easily copy any topic or message value - authentication with username/password or client certificates - connect over MQTT or WebSocket protocol - support for MQTT 3.1.1 and MQTT 5 - support for SSL/TLS - support for the Server Name Indication (SNI) TLS extension - support for self-signed certificates - full server certificate validation - manage and connect multiple brokers at once - full support for quality of service
Screenshots
Verdict
The clearest difference is rating: MQTT Loupe at 5.0 against MQTTool's 4.3. MQTTool's advantage is review sentiment (77% vs 50%) and ratings volume (26 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MQTT Loupe holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: MQTTool has 26 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 77% of MQTTool's written reviews are positive against 50% of MQTT Loupe's, so the app with the better star average is not the one people write more warmly about.
MQTTool ships an update every 4 weeks, MQTT Loupe every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | MQTTool | MQTT Loupe |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (26 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 76.9% of reviews — better | 50.0% of reviews |
| Number of ratings | 26 — better | 1 |
| Update frequency | Every 4 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 18 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Brent Petit | Jakob Bieling |
Customer experience
MQTTool
MQTT Loupe
In-app purchases
MQTTool
No in-app purchases
MQTT Loupe
No in-app purchases
