HTML Dual Viewer vs HTML Keep
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 Keep
Easily preview local HTML, Markdown, and ZIP files on your mobile device. Quickly open and view documents or web packages received or saved on your phone without needing complex tools or an internet connection.
- Local HTML file preview
- Native Markdown rendering
- ZIP web package import
- No account or login required
- Offline viewing capabilities
- Simple and fast interface
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HTML Keep is a simple, lightweight tool for browsing local HTML / Markdown / ZIP files. When you receive or save an HTML / Markdown / ZIP file on your phone and the system tools cannot show it as directly as a computer can, HTML Keep helps you preview the file quickly. You can import HTML / Markdown / ZIP files into HTML Keep through Share or Open In, then view them on iPhone or iPad. -- Useful for -- · Opening HTML / Markdown / ZIP files sent by others · Previewing web pages and Markdown documents you made · Viewing local pages, notes, or web packages transferred from a computer · Temporarily browsing offline HTML content · Reading local Markdown notes, instructions, or documents · Viewing ZIP files that contain multiple web resources · Testing simple HTML and CSS pages -- Key features -- · Open HTML files locally · Native preview for Markdown files · Import and organize ZIP web packages · No account required · No login required · No cloud server dependency · Simple interface, ready when opened · Good for lightweight previews and everyday viewing -- Focused on one small problem -- HTML Keep is not a complex developer tool or a web hosting service. It focuses on one specific problem: helping you open local HTML, Markdown, and ZIP files more easily on your phone. -- Note -- Because HTML / ZIP files can structure and reference resources in different ways, some images, styles, scripts, or external resources may not display completely. Some Markdown extensions, embedded content, or external resources may also behave differently depending on where the file came from. This app is better suited for quick viewing, temporary previews, and everyday browsing of local HTML / Markdown / ZIP files. --- HTML Keep Pro: HTML Keep Pro is available as annual and monthly subscriptions. Pro features include iCloud sync across devices, Agent automation, putting multiple pages on the Home Screen, recovering older deleted pages, and more. Annual and monthly plans are auto-renewable subscriptions. Payment is charged to your Apple Account, and the subscription renews automatically unless canceled before the end of the current period. You can cancel auto-renewal anytime in App Store or Apple Account subscription settings. Actual prices are shown by the App Store before purchase for your country or region, and may vary by region, taxes, and promotions. Terms of Use: https://help.htmlkeep.com/legal/terms/ Privacy Policy: https://help.htmlkeep.com/legal/privacy/
Screenshots
Verdict
The clearest difference is review sentiment: HTML Keep at 100% against HTML Dual Viewer's 0%. HTML Keep also leads on rating (5.0 vs 2.7) and update cadence (every 4 days vs every 3 weeks). HTML Dual Viewer's advantage is in-app purchases (none vs 4) and iOS requirement (8.4 vs 17.0). On price, ratings volume, ads and device support 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. HTML Keep sells 4 in-app purchases, starting at $5.99 per month. HTML Dual Viewer asks for nothing beyond the download.
HTML Keep holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 0% of HTML Dual Viewer's written reviews are positive against 100% of HTML Keep's.
HTML Dual Viewer ships an update every 3 weeks, HTML Keep every 4 days. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | HTML Dual Viewer | HTML Keep |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 3 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 8.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 16 MB | 31 MB |
| Age rating | 17+ | 4+ |
| Developer | Makoto Nishimoto | 光 杨 |
Customer experience
HTML Dual Viewer
HTML Keep
In-app purchases
HTML Dual Viewer
No in-app purchases
HTML Keep
- HTML Pocket Pro Monthly$5.991 Month
- HTML Pocket Pro Yearly14 Days trial$29.991 Year
- HTML Pocket Premium Lifetime Promo$28.49
- HTML Pocket Premium Lifetime$59.99









