HTML Dual Viewer vs Codable
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HTML Dual Viewer
View HTML source code and browse web pages side-by-side. Features a syntax highlighter and Google search integration for easy code checking and site analysis. Allows real-time updates of HTML source as you navigate.
- Dual screen HTML viewer
- Syntax highlighter
- Google search integration
- Real-time HTML source updates
- Adjustable screen width
- Full screen mode
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*Dual View & Google Search & Syntax Highlighter HTML Viewer!! *High quality but simple. Corresponding to search Google, it is a two-screen HTML Viewer. NEW!! Syntax Highlighter like "Sublime text" *Syntax Highlighter is heavy process. If loading time is too long, you had better changing background color to "Blue". (No Syntax Highlighter mode) [How to use] Browser screen left, the right to display the HTML source at the same time . Make it easy to adjust the width of each screen. You can check the HTML source to compare left and right. Because it corresponds also "Google search", you do not need to directly hit the URL. HTML source is also updated in real time when you open a new page. I also support shared from the browser. *Full Screen Mode: Double-tap on source view [Features] Unlike the HTML Viewer to display the hit URL, you can use "Google Search". Because every time you open a new web page, HTML source will be updated automatically, it is also useful to check the entire site. Simple, easy to use and safe operation as well, it is a handy HTML Viewer !! This app is best HTML Viewer !!
Codable
This app offers front-end web development tools optimized for mobile devices. It allows for basic debugging, rendering tests, and CSS editing of any web URL directly from your phone.
- Resizable viewport for device emulation
- View pre-rendered website source
- Inspect and edit CSS
- View and execute console commands
- Structured listing of rendered nodes
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Codable is a lightweight web developer toolkit for iPhone and iPad. Use the Safari extension to inspect pages where they already run. Select elements inline, browse the DOM tree, view HTML, inspect styles and node metadata, evaluate JavaScript, capture console output, view source, inspect resources, and review network activity. On supported devices, on-device Apple Intelligence can be used to find elements and perform edits. The main app has three tabs for development and testing: - Resize: a browser surface for testing responsive layouts with custom viewport width, height, scale, presets, and drag handles. - Scratchpad: a JavaScript editor and runner with syntax coloring, code-focused keyboard shortcuts, document support, and optional Apple Intelligence assistance on supported devices. - Extension: a small info page with instructions on how to enable the Safari extension, and a way to view a local demo page with CSS, JavaScript, resources, console logs, and network requests to try out the tools within Safari.
Screenshots
Verdict
The clearest difference is rating: Codable at 4.3 against HTML Dual Viewer's 2.7. HTML Dual Viewer's advantage is iOS requirement (8.4 vs 26.4). On price, review sentiment, ratings volume and update cadence 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.
Codable holds the better App Store score, 4.3 against 2.7. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews split almost evenly too, at 0% and 0% positive.
HTML Dual Viewer ships an update every 3 weeks, Codable monthly. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.
| Parameter | HTML Dual Viewer | Codable |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) | 4.3 (6 ratings) — better |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 3 | 6 — better |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.4 — better | 26.4 |
| Further details — not scored | ||
| Size | 16 MB | 9 MB |
| Age rating | 17+ | 17+ |
| Developer | Makoto Nishimoto | Jeremy Collins |
Customer experience
HTML Dual Viewer
Codable
In-app purchases
HTML Dual Viewer
No in-app purchases
Codable
No in-app purchases









