# Knife Steel Composition Chart vs Yomu EBook Reader

The clearest difference is in-app purchases: Knife Steel Composition Chart at none against Yomu EBook Reader's 2. Knife Steel Composition Chart also leads on review sentiment (94% vs 80%) and iOS requirement (9.0 vs 17.0). Yomu EBook Reader's advantage is update cadence (monthly vs every 5 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Yomu EBook Reader sells 2 one-off in-app purchases. Knife Steel Composition Chart asks for nothing beyond the download.

Knife Steel Composition Chart holds the better App Store score, 4.9 against 4.8. Both are backed by a comparable volume of ratings — 585 and 1.6K respectively. Written reviews point the same way: 94% of Knife Steel Composition Chart's written reviews are positive against 80% of Yomu EBook Reader's.

Knife Steel Composition Chart ships an update every 5 months, Yomu EBook Reader monthly. Both last shipped on November 1, 2026.

## The numbers

| Metric | Knife Steel Composition Chart | Yomu EBook Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (585 ratings)](https://appshunter.io/ios/app/knife-steel-composition-chart/id498892262/reviews)** | [4.8 (1.6K ratings)](https://appshunter.io/ios/app/yomu-ebook-reader/id562211012/reviews) |
| Number of ratings | 585 | **1.6K** |
| Positive reviews | **94.3% of reviews** | 80.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 61 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [ZviSoft LLC](https://appshunter.io/developer/498892265) | [Beat Raess](https://appshunter.io/developer/381075846) |

## What reviewers say

### Knife Steel Composition Chart

[App page](https://appshunter.io/ios/app/knife-steel-composition-chart/id498892262)

Access a comprehensive database of knife steel alloys, featuring over 6500 names and 1000 compositions. Compare alloys easily with visual bar graphs based on mass percentage, molar masses, or atomic counts. Report missing alloys or suggest improvements directly to the developer.

**Highlights:** Extensive alloy name database, Detailed composition data, Cross-reference international standards, Proprietary name equivalents, Bar graph composition comparison, Multiple comparison modes

**Features:** macOS Compatibility

**In-app purchases:** none


### Yomu EBook Reader

[App page](https://appshunter.io/ios/app/yomu-ebook-reader/id562211012)

An independent ebook reader designed for distraction-free reading with customizable styles and layouts. Supports a wide range of formats and offers robust library management features. Cloud synchronization is available for pro users.

**Highlights:** Customizable reading styles and themes, Supports EPUB, MOBI, Kindle, CBZ, CBR, PDF, Dynamic text and margin adjustment, Library organization with folders and tags, Cloud synchronization for books and annotations (Pro), Text highlighting and note-taking, Widgets for quick access to books and quotes

**Features:** Family Sharing, Siri integration

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yomu Pro | $7.99 | one-time |
| Yomu Pro (Karma) | $12.99 | one-time |

**What reviewers like**

- 🚀 Customizable reading experience
- 📚 Supports wide range of file formats
- 💻 Seamless sync across devices
- 🔒 No DRM or subscription issues
- 🗂️ Effective organization with folders and tags

**What reviewers complain about**

- 🐛 Occasional bugs with highlighting and page turning
- 🔍 Limited search functionality
- 📚 Lack of nested folders for better organization
- 🔧 Some customization options could be improved
- 🖼️ Thumbnails/cover art could be larger

**Reported bugs**

- Occasional crashes or freezes
- Inconsistent behavior when swiping to turn pages
- Syncing issues between devices
- Formatting problems with certain ebook files

**Requested features**

- Add support for text-to-speech
- Improve PDF handling with annotation and text selection
- Implement nested folder structure for better organization
- Expand font and theme customization options
- Introduce a continuous scrolling mode


## Frequently asked questions

### Is Knife Steel Composition Chart free?

Knife Steel Composition Chart is free to download, with no in-app purchases.

### Is Yomu EBook Reader free?

Yomu EBook Reader is free to download, with in-app purchases available.

### Which has better reviews, Knife Steel Composition Chart or Yomu EBook Reader?

Knife Steel Composition Chart is rated higher. Knife Steel Composition Chart averages 4.9 out of 5 from 585 ratings, while Yomu EBook Reader averages 4.8 from 1.6K ratings.

### Do Knife Steel Composition Chart or Yomu EBook Reader have ads?

Neither Knife Steel Composition Chart nor Yomu EBook Reader shows ads.

### Which is updated more often, Knife Steel Composition Chart or Yomu EBook Reader?

Knife Steel Composition Chart ships an update every 5 months, and Yomu EBook Reader monthly. Most recently, Knife Steel Composition Chart was updated on November 1, 2026 and Yomu EBook Reader on November 1, 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.*