AprilTag vs MQTTAnalyzer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AprilTag
This utility app detects 2D barcodes for robotics and augmented reality. It can function independently or send detected tag information to another device via UDP, transforming your iPhone into a robot tracking system.
- Fast and accurate 2D barcode detection
- Stand-alone detection mode
- UDP broadcasting of detected tags
- Robot tracking system functionality
- Augmented reality applications
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AprilTags are 2D barcodes designed to be quickly and accurately detected, and are used in a variety of robotics and augmented reality applications. This application is an AprilTag detector that can be used in stand-alone mode, or can broadcast any tags that it detects to another machine via UDP. With this application, your iPhone is turned into a self-contained and turn-key robot tracking system.
MQTTAnalyzer
Monitor and debug MQTT brokers on your Apple devices. Visualize data with hierarchical views, JSON highlighting, and charts. Publish messages, manage multiple brokers, and sync settings across devices. Free and open source.
- MQTT 3.1.1 and 5.0 support
- JSON highlighting and pretty-printing
- Time series charts for numeric values
- Connect to multiple brokers
- Full-text search
- Publish messages
- iCloud sync
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Monitor and debug your MQTT broker from iPhone, iPad, or Mac. MQTTAnalyzer is the essential tool for smart home enthusiasts, IoT developers, and anyone working with MQTT-based systems. Free, open source, and no ads. CONNECT WITH CONFIDENCE • MQTT 3.1.1 and MQTT 5.0 support • MQTT and WebSocket connections • SSL/TLS with ALPN and server CA certificate validation • Username/password and client certificate authentication • Support for self-signed certificates • Predefined settings for AWS IoT • Connection diagnostics to identify issues quickly VISUALIZE YOUR DATA • Hierarchical topic tree view • JSON highlighting and pretty-printing • Time series charts for numeric values • ANSI color code rendering • Image viewer with pinch-to-zoom (PNG, JPEG, GIF, WebP, and more) • Hex viewer for binary payloads STAY ORGANIZED • Connect to multiple brokers simultaneously • Subscribe to multiple topics per broker • Full-text search across topics and messages • Unread message indicators • Statistics panel with message counts • Large payload support (10MB+) with export PUBLISH AND CONTROL • Publish messages with QoS and retain flag • JSON message builder with form interface • Delete retained messages from broker • Siri shortcuts for quick actions SYNC ACROSS DEVICES • iCloud sync for settings and certificates • Native experience on iPhone, iPad, and Mac Have feedback or feature requests? Visit our GitHub page — MQTTAnalyzer is open source and community-driven.
Screenshots
Verdict
The clearest difference is review sentiment: MQTTAnalyzer at 81% against AprilTag's 25%. MQTTAnalyzer also leads on rating (4.5 vs 3.6) and update cadence (every 5 days vs every 33 months). AprilTag's advantage is iOS requirement (12.0 vs 18.0). On price, ratings volume, 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.
MQTTAnalyzer holds the better App Store score, 4.5 against 3.6. Both are backed by a comparable volume of ratings — 9 and 23 respectively. Written reviews point the same way: 25% of AprilTag's written reviews are positive against 81% of MQTTAnalyzer's.
AprilTag ships an update every 33 months, MQTTAnalyzer every 5 days. The most recent releases landed on September 24, 2026 and October 16, 2026 respectively.
| Parameter | AprilTag | MQTTAnalyzer |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (9 ratings) | 4.5 (23 ratings) — better |
| Positive reviews | 25.0% of reviews | 80.9% of reviews — better |
| Number of ratings | 9 | 23 — better |
| Update frequency | Every 33 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 5 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Edwin Olson | Philipp Arndt |
Customer experience
AprilTag
MQTTAnalyzer
In-app purchases
AprilTag
No in-app purchases
MQTTAnalyzer
No in-app purchases









