HTML Dual Viewer vs HTML Sandbox 2
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 !!
HTML Sandbox 2
Create custom lock and home screens using HTML and various data sources like weather, battery, and calendar events. Download themes from a large community and receive support.
- Custom lock screen design
- Custom home screen design
- Integrate weather data
- Integrate battery status
- Integrate calendar events
- Integrate RSS feeds
- Community theme downloads
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The HTML Sandbox app is a productivity tool for the HTML Sandbox shortcut. With the shortcut you can create your own lockscreen and/or homescreen using e.g. weather data, battery status, calendar events, RSS-feeds and much more. Download the HTML Sandbox shortcut from the app. Join our iNNOVATION community with 18k+ members and download your favourite themes. Get 24/7 support from iNNOVATION community.
Screenshots
Verdict
The clearest difference is review sentiment: HTML Sandbox 2 at 85% against HTML Dual Viewer's 0%. HTML Sandbox 2 also leads on rating (4.8 vs 2.7) and update cadence (every 5 days vs every 3 weeks). HTML Dual Viewer's advantage is iOS requirement (8.4 vs 16.0). On price, ads, in-app purchases and monetization model 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.
HTML Sandbox 2 holds the better App Store score, 4.8 against 2.7. That said, the two scores are not equally well evidenced: HTML Sandbox 2 has 53 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of HTML Dual Viewer's written reviews are positive against 85% of HTML Sandbox 2's.
HTML Dual Viewer ships an update every 3 weeks, HTML Sandbox 2 every 5 days. The most recent releases landed on August 15, 2026 and August 12, 2026 respectively.
| Parameter | HTML Dual Viewer | HTML Sandbox 2 |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) | 4.8 (53 ratings) — better |
| Positive reviews | 0.0% of reviews | 84.6% of reviews — better |
| Number of ratings | 3 | 53 — better |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 8.4 — better | 16.0 |
| Further details — not scored | ||
| Size | 16 MB | 14 MB |
| Age rating | 17+ | 4+ |
| Developer | Makoto Nishimoto | Eric Roembach |
Customer experience
HTML Dual Viewer
HTML Sandbox 2
In-app purchases
HTML Dual Viewer
No in-app purchases
HTML Sandbox 2
No in-app purchases
