Modbus TCP Pro vs MQTT Debug & Analyzer Client

Modbus Reader & Writer is a powerful and intuitive Modbus TCP tool designed for professionals. Built for installers, HVAC technicians, engineers, and system integrators who need a fast and reliable way to test, read, and write Modbus registers directly from their iPhone. Whether you work with heat pumps, PLCs, energy meters, or industrial controllers, this app gives you full control over Modbus TCP devices — anytime, anywhere. Key Features • Modbus TCP Connectivity • Connect to any Modbus TCP device using IP address and port • Configurable Unit ID (slave ID) • Read Registers • Holding Registers (Function Code 03) • Input Registers (Function Code 04) • Support for multiple data types and values • Write Registers • Write Single Register • Write Multiple Registers • Instant feedback and clear error reporting • Designed for Testing & Debugging • Ideal for commissioning and troubleshooting • Perfect for field testing without a laptop • Compatible with Modbus simulators and test environments (e.g. Node-RED) Who Is This App For? • HVAC installers and service technicians • Industrial automation and PLC engineers • Energy and building management professionals • System integrators and commissioning engineers • Developers testing Modbus-based systems Reliable & Efficient • Fast and stable connections • Clear and actionable error messages • Clean, focused interface — no unnecessary complexity • Optimized for real-world professional use Modbus Reader & Writer is your mobile Modbus toolbox — ready for every installation, test, and service intervention.

MQTT Debug & Analyzer Client is a professional utility designed for IoT developers, network engineers, and smart home enthusiasts. Debug, monitor, and analyze your MQTT traffic with ease. Key Features • Advanced Connectivity: Support for TCP, WebSockets, and SSL/TLS (Certificates management included). • Protocol Support: Fully compatible with MQTT 3.1.1 and the latest MQTT 5.0 features (User Properties, Shared Subscriptions). • Data Visualization • Syntax highlighting for JSON, XML, and plain text. • Hex view for binary data inspection. • Real-time charts for numerical payloads. • Intuitive Interface: Chat-style message history makes tracking Publish/Subscribe flows simple. • Broker Compatibility: Works seamlessly with EMQX, Mosquitto, HiveMQ, AWS IoT, Azure, and Google Cloud IoT. • Supports dark mode and light mode • Support for displaying replies in hexadecimal or plain text • Support sending messages in hexadecimal format Why choose us? • Reliable: Keeps background connections alive (where supported) for continuous monitoring. • Flexible: Manage multiple broker profiles and switch between them instantly. • Insights: Filter messages by topic or content to find exactly what you are looking for. Perfect for debugging Home Assistant setups, Tasmota devices, or industrial PLC data. MQTT Pro Subscriptions You can subscribe for MQTT Pro Subscriptions to all features and content offered for purchase within the app. MQTT Pro offers subscriptions. The subscription prices are: (i) Monthly Subscription ($0.99 / Month) (ii) Yearly Subscription ($2.99 / Year) You can subscribe to a Monthly Subscription plan ($0.99 billed once a month) or a Yearly Subscription plan ($2.99 billed once a year). Payment will be charged to iTunes Account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. The prices are in US dollars. Pricing in other countries may vary and actual charges may be converted to your local currency depending on the country of residence. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Our app is functional without purchasing an Auto-Renewable subscription, and you can use all the unlocked content after the subscription expires. Q: How do I restore the subscriptions on new devices? A: You can tap the 'Restore' button on the subscription page. Privacy Policy: https://www.whalesgrowth.top/pp/ Terms of Service: https://www.whalesgrowth.top/tos/