Comparison

Knife Steel Composition Chart vs Yomu EBook Reader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Knife Steel Composition Chart

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
Read full description

Knife Steel Composition and name cross-reference database. Includes popular, high end and exotic alloys used in knife blades. Over 6500 alloy names, over 1000 compositions. Alloy names for 21 different international standards, proprietary names and their equivalents. Easy alloy composition comparison with bar graph in 3 modes: mass percentage, molar masses and atomic count per 1000 atoms. If you have suggestions for improvement, please contact me. Posting in the review that there's a room for improvement doesn't help me at all, I am not a designer, but a software engineer. Please report missing alloys, as in either post the alloy name, or contact me. Complaining in the review "I didn't find what I wanted" means very little. If you encounter any problems using the app, please contact me using email. Posting in the review you have a problem, won't give me enough information to fix it. Sorry, there will be no translations to any language. There is no team, I am just one person collecting steel data and coding the app on web and mobile platforms. I have neither time nor resources to keep constantly translating large database. Case CV has been the database for a long time. Search for Case does show in the results. Case isn't the steel maker though.

About

Yomu EBook Reader

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
Read full description

Yomu is an independent reader for book lovers. Yomu’s design is carefully crafted for ebooks and offers custom styles for better readability and distraction-free reading. Designed to let you focus on reading, Yomu has no unnecessary preferences. Just open a book and start reading. Yomu’s fluid layout dynamically adjusts all text properties and margins depending on your preferred styles and device, giving you an optimal reading experience. FORMATS Yomu supports standard ebooks without digital rights management. Supported formats: - EPub (.epub) - Mobi (.mobi, .prc) - Kindle (.azw, .azw3, .kf8) - Comics (.cbz, .cbr) - PDF (.pdf) Choose free books from publishers such as Standard Ebooks or Project Gutenberg. Download ebooks directly from your browser or copy files from other apps. Import files with iCloud Drive, iTunes File Sharing, or from Dropbox, Google Drive, OneDrive, OPDS and Calibre. READER The reader's design is carefully crafted for ebooks and offers custom styles for better readability. Choose your favorite theme font (Lato, Georgia, Lexend, OpenDyslexic, ...), reader mode (day, sepia, grey, black, ...), select a preset or custom font size, content layout (page, scroll) and many more options. All settings can be saved as your personal default for each book. Swipe or tap to go to the next page. You can also use the book's content outline or table of contents to navigate to another chapter. While reading EPub, Mobi and Kindle books, select text to take notes or highlight favorite sections. Create bookmarks or search inside ebooks to quickly find anything you are looking for. LIBRARY Organise your books in an easy to use library. Manage your library by creating folders or tags to organize your books. Sort your collection either by title, author, series, recently read or drag and drop for a custom order. You can edit a document's title, author, summary, cover or any other meta data. Save or export your books with all information and annotations in text, markdown or json format. CLOUD Yomu's Cloud Library (pro only) stores your books and annotations securely in Apple's iCloud. Keep all your ebooks safe and at hand on whatever device. Every time you change something on one device, it's synced to all your other devices. Always have the latest version, when you start reading on your iPad and continue on your iPhone on the go. Please note that you need to be signed in on your device with the same Apple ID on all platforms. WIDGETS See your recently read books or highlighted quotes. Yomu includes widgets to quickly view and open your books and quotes. Add a widget from the gallery and choose a list from the options. Tap on an entry to continue reading where you left off. YOMU PRO Yomu is free to use and includes all basic features. Every ebook format, theme or setting is available and lets you try out the unrestricted reader. However, the free version has some limitations and does not include certain features. Upgrade to Yomu Pro to get: - Cloud Library: Store and sync your library with Apple’s iCloud. - Unlimited Documents: No limit on the number of documents. - No Advertisement: Free version can display ads. Yomu is an independent app, your purchase supports the further development. When you buy an in-app purchase, you are doing so through Apple’s App Store and agree to their terms and conditions. Payments will be charged to the credit card of your Apple account. SERVICE Yomu is available for iPhone, iPad and Mac. In contrast to other apps, Yomu does not collect or sell any personal information. And it keeps your data private. Terms of Service: https://www.yomu-reader.com/terms/ Privacy Policy: https://www.yomu-reader.com/privacy/ Support: https://www.yomu-reader.com/support/

Screenshots

Knife Steel Composition Chart4 screens
Yomu EBook Reader4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard5 real differences · 5 level
Knife Steel Composition Chart versus Yomu EBook Reader: the parameters behind the verdict, then further details
ParameterKnife Steel Composition ChartYomu EBook Reader
PriceFreeFree
Rating4.9 (585 ratings) — better4.8 (1.6K ratings)
Positive reviews94.3% of reviews — better80.2% of reviews
Number of ratings5851.6K — better
Update frequencyEvery 5 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, Mac — better
Requires iOS9.0 — better17.0
Further details — not scored
Size4 MB61 MB
Age rating4+4+
DeveloperZviSoft LLCBeat Raess

Customer experience

Knife Steel Composition Chart

All ratings554 ratings
Positive99.1%
Neutral0.5%
Negative0.4%
Written reviews122 reviews
Positive94.3%
Neutral1.6%
Negative4.1%

Yomu EBook Reader

All ratings1,625 ratings
Positive95.4%
Neutral1.9%
Negative2.6%
Written reviews757 reviews
Positive80.2%
Neutral6.7%
Negative13.1%

Bugs and requests

Knife Steel Composition Chart

Not enough reviews yet to summarise bugs or requests.

Yomu EBook Reader

Reported bugs

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

Requested features

6 requests
  • 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
Show 1 more
  • Add a more prominent 'return to last read position' feature

In-app purchases

None

Knife Steel Composition Chart

No in-app purchases

2 purchases

Yomu EBook Reader

One-time2
  • Yomu Pro$7.99
  • Yomu Pro (Karma)$12.99

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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