# JavaScript Anywhere JSAnywhere vs HTML Viewer Pro

The clearest difference is in-app purchases: JavaScript Anywhere JSAnywhere at none against HTML Viewer Pro's 2. JavaScript Anywhere JSAnywhere also leads on update cadence (every 2 months vs every 15 months) and ratings volume (459 vs 45). HTML Viewer Pro's advantage is rating (3.9 vs 3.5) and iOS requirement (12.0 vs 15.0). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. HTML Viewer Pro sells 2 in-app purchases, starting at $1.99 per month. JavaScript Anywhere JSAnywhere asks for nothing beyond the download.

HTML Viewer Pro holds the better App Store score, 3.9 against 3.5. That said, the two scores are not equally well evidenced: JavaScript Anywhere JSAnywhere has 459 ratings behind it against 45, so its average is the more settled of the two. Written reviews complicate that: 55% of JavaScript Anywhere JSAnywhere's written reviews are positive against 47% of HTML Viewer Pro's, so the app with the better star average is not the one people write more warmly about.

JavaScript Anywhere JSAnywhere ships an update every 2 months, HTML Viewer Pro every 15 months. The most recent releases landed on September 23, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | JavaScript Anywhere JSAnywhere | HTML Viewer Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (459 ratings)](https://appshunter.io/ios/app/javascript-anywhere-jsanywhere/id363452277/reviews) | **[3.9 (45 ratings)](https://appshunter.io/ios/app/html-viewer-pro/id1521187909/reviews)** |
| Number of ratings | **459** | 45 |
| Positive reviews | **55.1% of reviews** | 47.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 months** | Every 15 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 54 MB | 33 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Tatsuya Tobioka](https://appshunter.io/developer/363452280) | [Hayato Shimizu](https://appshunter.io/developer/1207195348) |

## What reviewers say

### JavaScript Anywhere JSAnywhere

[App page](https://appshunter.io/ios/app/javascript-anywhere-jsanywhere/id363452277)

This app provides a portable programming editor for web development on mobile devices. It allows users to write and preview JavaScript, HTML, and CSS code, with features like console logging and file sharing. It's designed for web engineers and designers needing a simple, on-the-go coding solution.

**Highlights:** Write JavaScript, HTML, CSS, Internal browser preview, Console logs and errors, Import/export via Dropbox, Project templates, Wi-Fi server

**In-app purchases:** none

**What reviewers like**

- 🚀 Constant use
- 🚀 Amazing app
- 🚀 Great for learning
- 🚀 Perfect for coding on the go
- 👍 Simple but effective

**What reviewers complain about**

- 🐛 Crashes
- 🐛 Bugs
- 🐛 Doesn't work
- 🐛 Issues with CSS and JavaScript
- 🐛 Compatibility problems

**Reported bugs**

- Crashes when creating new projects
- CSS and JavaScript changes not reflected in output
- Incompatible with newer iOS versions
- Unexpected behavior with certain JavaScript features

**Requested features**

- Add ability to save files
- Improve syntax highlighting
- Add line numbers
- Support for more file types (e.g. TypeScript, SCSS)
- Ability to create and manage multiple projects


### HTML Viewer Pro

[App page](https://appshunter.io/ios/app/html-viewer-pro/id1521187909)

View HTML source code from URLs or directly from Safari. This app offers multi-tab browsing, bookmarking, and search functionality. Customize the display with various themes, fonts, and user agents.

**Highlights:** View source code from URLs, View source code from Safari share, Multi-tab browsing, Bookmark and history management, Keyword search in source code, Switch between static and dynamic HTML, Customizable themes and fonts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly plan) | $1.99 | per month |
| Premium (Buying out) | $19.99 | one-time |


## Frequently asked questions

### Is JavaScript Anywhere JSAnywhere free?

JavaScript Anywhere JSAnywhere is free to download, with no in-app purchases.

### Is HTML Viewer Pro free?

HTML Viewer Pro is free to download, with in-app purchases available.

### Which has better reviews, JavaScript Anywhere JSAnywhere or HTML Viewer Pro?

HTML Viewer Pro is rated higher. JavaScript Anywhere JSAnywhere averages 3.5 out of 5 from 459 ratings, while HTML Viewer Pro averages 3.9 from 45 ratings.

### Do JavaScript Anywhere JSAnywhere or HTML Viewer Pro have ads?

Both JavaScript Anywhere JSAnywhere and HTML Viewer Pro show ads.

### Which is updated more often, JavaScript Anywhere JSAnywhere or HTML Viewer Pro?

JavaScript Anywhere JSAnywhere ships an update every 2 months, and HTML Viewer Pro every 15 months. Most recently, JavaScript Anywhere JSAnywhere was updated on September 23, 2026 and HTML Viewer Pro on September 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*