# Source Viewer XL vs Dev Calc

The clearest difference is price: Dev Calc at Free against Source Viewer XL's $1.99. Dev Calc also leads on update cadence (every 2 months vs every 28 months) and device support (3 vs 1). Source Viewer XL's advantage is rating (4.7 vs 2.0) and in-app purchases (none vs 1). On review sentiment and ratings volume there is nothing between them.

Dev Calc is free to download; Source Viewer XL costs $1.99 up front. Dev Calc sells 1 in-app purchase, starting at $1.99 per month. Source Viewer XL asks for nothing beyond the download.

Source Viewer XL holds the better App Store score, 4.7 against 2.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews complicate that: 57% of Source Viewer XL's written reviews are positive against 60% of Dev Calc's, so the app with the better star average is not the one people write more warmly about.

Source Viewer XL ships an update every 28 months, Dev Calc every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Source Viewer XL | Dev Calc |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/source-viewer-xl/id364691406/reviews)** | [2.0 (2 ratings)](https://appshunter.io/ios/app/dev-calc-developer-calculator/id1576503219/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 57.1% of reviews | **60.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 28 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 51 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [Toshiya Hondo](https://appshunter.io/developer/1571875732) |

## What reviewers say

### Source Viewer XL

[App page](https://appshunter.io/ios/app/source-viewer-xl/id364691406)

View the HTML, CSS, and JavaScript source code of any website. Highlighted syntax, extracted links, and image galleries make code analysis easy. Save images, bookmarks, and history for later.

**Highlights:** Syntax highlighting for HTML, CSS, and JavaScript, Extracts and follows embedded links, Lists and views all website images, Saves images to photo album, Bookmark and session history management, Copy/paste code functionality

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

**In-app purchases:** none


### Dev Calc

[App page](https://appshunter.io/ios/app/dev-calc-developer-calculator/id1576503219)

This app assists developers and programmers with immediate numeric conversions between binary, octal, decimal, and hexadecimal formats. It also provides tools for generating color codes from RGB, HSL, and HSV values, with a color picker and preset options.

**Highlights:** Numeric conversion (Bin, Oct, Dec, Hex), Signed/Unsigned options, Adjustable bit sizes (8, 16, 32, 64), RGB, HSL, HSV color code generation, Color picker, Preset color options

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Monthly) | $1.99 | per month |


## Frequently asked questions

### Is Source Viewer XL free?

Source Viewer XL costs $1.99, with no in-app purchases.

### Is Dev Calc free?

Dev Calc is free to download, with in-app purchases available.

### Which has better reviews, Source Viewer XL or Dev Calc?

Source Viewer XL is rated higher. Source Viewer XL averages 4.7 out of 5 from 3 ratings, while Dev Calc averages 2.0 from 2 ratings.

### Do Source Viewer XL or Dev Calc have ads?

Dev Calc shows ads; Source Viewer XL does not.

### Which is updated more often, Source Viewer XL or Dev Calc?

Source Viewer XL ships an update every 28 months, and Dev Calc every 2 months. Most recently, Source Viewer XL was updated on November 1, 2026 and Dev Calc on November 3, 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.*