# Angle Gradient Inclinometer vs HTML Viewer

The clearest difference is review sentiment: Angle Gradient Inclinometer at 51% against HTML Viewer's 0%. Angle Gradient Inclinometer also leads on in-app purchases (none vs 5) and ratings volume (314 vs 2). HTML Viewer's advantage is ads (none vs shown) and update cadence (weekly vs every 8 months). On price and device support there is nothing between them.

Both are free to download. HTML Viewer sells 5 one-off in-app purchases. Angle Gradient Inclinometer asks for nothing beyond the download.

Angle Gradient Inclinometer holds the better App Store score, 4.3 against 4.0. That said, the two scores are not equally well evidenced: Angle Gradient Inclinometer has 314 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 51% of Angle Gradient Inclinometer's written reviews are positive against 0% of HTML Viewer's.

Angle Gradient Inclinometer ships an update every 8 months, HTML Viewer weekly. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Angle Gradient Inclinometer | HTML Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (314 ratings)](https://appshunter.io/ios/app/angle-gradient-inclinometer/id530077112/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/html-viewer-comic-reader/id6782344666/reviews) |
| Number of ratings | **314** | 2 |
| Positive reviews | **51.1% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 8 months | **Weekly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 11 MB | 14 MB |
| Requires iOS | **13** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Jimmy DE BRUYNE](https://appshunter.io/developer/1879002118) |

## What reviewers say

### Angle Gradient Inclinometer

[App page](https://appshunter.io/ios/app/angle-gradient-inclinometer/id530077112)

Easily measure tilt angles with this free protractor app. It displays inclination from 0 to 359 degrees, along with gradient percentages and angles summing to 180 or 360 degrees. Switch to theodolite mode to set a specified angle to zero.

**Highlights:** Measure tilt angles 0-359 degrees, Display gradient percentage, Show sum angles (180/360), Theodolite mode, Set specified angle to zero

**Features:** Vision Pro support

**In-app purchases:** none


### HTML Viewer

[App page](https://appshunter.io/ios/app/html-viewer-comic-reader/id6782344666)

This app allows you to open and read various digital content formats, including HTML websites, comics (CBZ, CBR), EPUB books, and PDFs, all offline. It offers advanced rendering for web content and specialized reading modes for comics and books, with robust search and iCloud synchronization.

**Highlights:** Offline HTML website rendering, CBZ, CBR, EPUB, PDF support, Panel by Panel comic reading, Continuous PDF scrolling, Full text search including scanned PDFs, iCloud synchronization, No ads or tracking

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Me a Coffee | $2.99 | one-time |
| Buy Me a Dessert | $4.99 | one-time |
| Buy Me a Meal | $8.99 | one-time |
| Pagira Pro | $11.99 | one-time |
| Pagira Pro Supporter | $22.99 | one-time |


## Frequently asked questions

### Is Angle Gradient Inclinometer free?

Angle Gradient Inclinometer is free to download, with no in-app purchases.

### Is HTML Viewer free?

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

### Which has better reviews, Angle Gradient Inclinometer or HTML Viewer?

Angle Gradient Inclinometer is rated higher. Angle Gradient Inclinometer averages 4.3 out of 5 from 314 ratings, while HTML Viewer averages 4.0 from 2 ratings.

### Do Angle Gradient Inclinometer or HTML Viewer have ads?

Angle Gradient Inclinometer shows ads; HTML Viewer does not.

### Which is updated more often, Angle Gradient Inclinometer or HTML Viewer?

Angle Gradient Inclinometer ships an update every 8 months, and HTML Viewer weekly. Most recently, Angle Gradient Inclinometer was updated on November 1, 2026 and HTML Viewer on October 31, 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.*