# RDB情報 vs HTML Viewer

The clearest difference is in-app purchases: RDB情報 at none against HTML Viewer's 4. HTML Viewer's advantage is ads (none vs shown) and update cadence (every 8 days vs every 2 months). On price there is nothing between them.

Both are free to download. HTML Viewer sells 4 in-app purchases, starting at $14.99 per year. RDB情報 asks for nothing beyond the download.

RDB情報 ships an update every 2 months, HTML Viewer every 8 days. The most recent releases landed on September 21, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | RDB情報 | HTML Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (9 ratings)](https://appshunter.io/ios/app/html-viewer-view-source/id6746666386/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Best chart rank | — | **#62** |
| Size | 10 MB | 84 MB |
| Requires iOS | 26.5 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [KAZUTOSHI KINOSHITA](https://appshunter.io/developer/1148380017) | [Utsav Mangla](https://appshunter.io/developer/1729995457) |

## What reviewers say

### RDB情報

[App page](https://appshunter.io/ios/app/rdb/id1618715949)

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

**In-app purchases:** none


### HTML Viewer

[App page](https://appshunter.io/ios/app/html-viewer-view-source/id6746666386)

**Currently charting:** #62 Top Grossing · Developer Tools (US App Store)

Inspect and analyze the HTML source code of any website or local files. Features include element inspection, syntax highlighting, and multi-tab support for efficient workflow. Ideal for developers and students learning web technologies.

**Highlights:** View website source code, Inspect elements, Open local/iCloud HTML files, Multiple tabs support, Syntax highlighting, Search and copy code

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HTML Viewer - All access - Mid | $14.99 | per year |
| HTML Viewer - All access - Max | $19.99 | per year |
| HTML Viewer - All access - Max | $19.99 | per year |
| HTML Viewer - Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is RDB情報 free?

RDB情報 is free to download, with no in-app purchases.

### Is HTML Viewer free?

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

### Do RDB情報 or HTML Viewer have ads?

RDB情報 shows ads; HTML Viewer does not.

### Which is updated more often, RDB情報 or HTML Viewer?

RDB情報 ships an update every 2 months, and HTML Viewer every 8 days. Most recently, RDB情報 was updated on September 21, 2026 and HTML Viewer on September 28, 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.*