MQTT Spy vs SourceView Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MQTT Spy
This application allows for testing the pub/sub MQTT protocol. Connect to an MQTT broker to send and receive messages, control IoT devices, and monitor sensors. It offers features for saving broker lists, custom publishing buttons, and data monitoring in ASCII or HEX.
- Save broker list
- Custom publish buttons
- Monitor data as ASCII or HEX
- Auto-send commands at intervals
- Keep screen on/off option
- Send log files
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INTRODUCTION: - MQTT Spy is used for testing pub/sub protocol with MQTT - Simply create a MQTT connection with broker and test MQTT messaging - With this app, You can control any MQTT enabled IoT devices and monitor sensors with pub/sub protocol. FEATURES: - Save broker list - Separate panels for subscribe and publish data - Custom your own buttons for frequent publishing of same data. - Monitoring receiving data as ASCII or HEX. - Publish Data as ASCII or HEX. - Auto send commands at timed interval - Selection for \r \n at the end of sending data. - Send Log file of Subscribed and Published data. - Keep Screen on/off option.
SourceView Pro
Analyze the source code of any webpage directly within your iOS Safari browser. This tool offers professional syntax highlighting, advanced formatting options, and efficient access to HTML, designed for developers and web enthusiasts.
- Syntax highlighting
- Advanced formatting
- Adjustable text size
- Offline source code access
- Privacy focused
- Dark mode UI
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SourceView Pro brings the power of desktop web development to your iOS Safari browser. View and analyze the source code of any webpage with a sleek, professional interface and powerful features designed for developers, designers, and web enthusiasts. Key Features: • Beautiful Syntax Highlighting • Professional code highlighting with neon-style theme • Clear, readable formatting optimized for mobile • Customizable font sizes for comfortable viewing • Advanced Formatting Options • Pretty Print HTML for better readability • Line wrapping options • Adjustable text size • Copy formatted or raw source code • Fast & Efficient • Instant source code access through Safari extension • Works offline - no internet required for processing • Quick copy-to-clipboard functionality • Privacy Focused • Works completely offline • No data collection • No tracking • No analytics • Developer Friendly • View any webpage's HTML source • Analyze website structures • Learn from other developers' code • Perfect for debugging and learning • Professional Design • Dark mode interface • Clean, modern UI • Optimized for iOS devices • Intuitive controls Perfect for: Web Developers UI/UX Designers Students learning web development Digital marketers analyzing websites Anyone interested in web technology Download SourceView Pro today and unlock professional source code viewing capabilities on your iOS device!
Screenshots
Verdict
The clearest difference is in-app purchases: SourceView Pro at none against MQTT Spy's 1. SourceView Pro also leads on ads (none vs shown) and update cadence (every 5 days vs every 4 months). MQTT Spy's advantage is device support (4 vs 2) and iOS requirement (10.0 vs 17.6). On price 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
MQTT Spy costs $0.99 and SourceView Pro $0.99 up front. MQTT Spy sells 1 one-off in-app purchase. SourceView Pro asks for nothing beyond the download.
MQTT Spy ships an update every 4 months, SourceView Pro every 5 days. Both last shipped on October 27, 2026.
| Parameter | MQTT Spy | SourceView Pro |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | — | 33.3% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 months | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | — | #119 — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 26 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Gopi Gadhiya | Dor Pascal |
Customer experience
MQTT Spy
SourceView Pro
In-app purchases
MQTT Spy
- Remove Ads$2.99
SourceView Pro
No in-app purchases
Questions
Is MQTT Spy free?
Is SourceView Pro free?
Do MQTT Spy or SourceView Pro have ads?
Which is updated more often, MQTT Spy or SourceView Pro?
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