MQTT Server & Broker Pro

MQTT Server & Broker Pro turns your Android phone into a complete MQTT broker. Start it with one tap, connect your IoT devices over Wi-Fi, and watch every message arrive in real time.

LIVE TRAFFIC INSPECTOR
The broker screen is a live dashboard, not just a Start button.
• Connected clients with IP address, Client ID and keep-alive status
• Live message log: who published what, to which topic, with QoS and retain flags
• Pause the log, filter by PUB / SUB / CONNECT, or by topic with + and # wildcards
• Open any message to view the payload as JSON, raw text or hex
• Topic tree with retained messages and per-topic message rates

BROKER AND CLIENT IN ONE APP
Keep the broker running, switch to the Client tab and publish a test message to localhost:1883 right away. Subscribe with wildcards and watch messages arrive. No second app needed.

STAYS ONLINE ON ANDROID 14, 15 AND 16
• Foreground service with a persistent notification showing IP address, port and connected clients
• Shortcut to Android battery optimization settings so the broker keeps running with the screen off
• Optional Wi-Fi and CPU wake lock while clients are connected
• Tips for phones that add their own background limits

PRO FEATURES
• Persistence to SQLite: save every message that passes through the broker, search history, choose retention, export CSV or JSON
• Authentication and ACL: create users and passwords and set publish/subscribe permissions per topic on simple screens, with a rule tester. No config files to edit.
• MQTT over WebSockets on port 8083, so browser dashboards on your LAN can connect to the phone, with a QR code to share the address
• MQTT over TLS on port 8883 and secure WebSockets
• Unlimited clients, long-range statistics, no ads

FOR MAKERS AND DEVELOPERS
• MQTT 3.1.1 and MQTT 5.0
• QoS 0, 1 and 2, retained messages and Last Will
• Works with ESP32, Arduino and Raspberry Pi projects and any standard MQTT client
• Statistics: messages per minute, bytes in and out, busiest topics

PRIVACY
The broker runs on your phone and listens on your local network. Your messages stay on your device; we do not send your MQTT traffic to our servers.

FREE AND PRO
The app is free to download and shows ads. Pro is an optional in-app purchase that removes ads and unlocks the Pro features. You can also watch an optional rewarded ad to try one Pro feature for 24 hours.