# Aluminum Quick Reference vs BookShelves eBook Reader

The clearest difference is review sentiment: BookShelves eBook Reader at 64% against Aluminum Quick Reference's 0%. BookShelves eBook Reader also leads on update cadence (weekly vs every 7 months) and ratings volume (19 vs 1). Aluminum Quick Reference's advantage is rating (5.0 vs 3.8) and in-app purchases (none vs 4). On price, ads and device support there is nothing between them.

Both are free to download. BookShelves eBook Reader sells 4 one-off in-app purchases. Aluminum Quick Reference asks for nothing beyond the download.

Aluminum Quick Reference holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: BookShelves eBook Reader has 19 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 0% of Aluminum Quick Reference's written reviews are positive against 64% of BookShelves eBook Reader's, so the app with the better star average is not the one people write more warmly about.

Aluminum Quick Reference ships an update every 7 months, BookShelves eBook Reader weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Aluminum Quick Reference | BookShelves eBook Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/aluminum-quick-reference/id923924594/reviews)** | [3.8 (19 ratings)](https://appshunter.io/ios/app/bookshelves-ebook-reader/id6756848973/reviews) |
| Number of ratings | 1 | **19** |
| Positive reviews | 0.0% of reviews | **63.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 56 MB |
| Requires iOS | **6.0** | 17.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [PFI Knowledge Solutions Ltd](https://appshunter.io/developer/702178176) | [CPE Verm. GmbH](https://appshunter.io/developer/1863249600) |

## What reviewers say

### Aluminum Quick Reference

[App page](https://appshunter.io/ios/app/aluminum-quick-reference/id923924594)

Access essential data for over 200 aluminum alloy designations and temper combinations. View mechanical properties, physical properties, and chemical composition limits. This reference is useful on its own or with a larger database.

**Highlights:** Data on 200+ aluminum alloy designations, Mechanical and physical properties (US Customary & SI Metric), Chemical composition limits, Typical uses by alloy-temper, Companion to ASM Alloy Center Database

**Features:** macOS Compatibility

**In-app purchases:** none


### BookShelves eBook Reader

[App page](https://appshunter.io/ios/app/bookshelves-ebook-reader/id6756848973)

This app allows you to read EPUB, PDF, and comic books with access to over 1.5 million free public domain books. Organize your library, customize your reading experience with multiple themes and fonts, and sync your progress across devices.

**Highlights:** 1.5 million+ free books, EPUB, PDF, and comic reader, Customizable themes and fonts, iCloud sync across devices, Smart library management, Highlighting and note-taking, Export highlights

**Features:** Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $2.99 | one-time |
| Medium Tip | $3.99 | one-time |
| Large Tip | $8.99 | one-time |
| Unlock Pro | $9.99 | one-time |


## Frequently asked questions

### Is Aluminum Quick Reference free?

Aluminum Quick Reference is free to download, with no in-app purchases.

### Is BookShelves eBook Reader free?

BookShelves eBook Reader is free to download, with in-app purchases available.

### Which has better reviews, Aluminum Quick Reference or BookShelves eBook Reader?

Aluminum Quick Reference is rated higher. Aluminum Quick Reference averages 5.0 out of 5 from 1 ratings, while BookShelves eBook Reader averages 3.8 from 19 ratings.

### Do Aluminum Quick Reference or BookShelves eBook Reader have ads?

Neither Aluminum Quick Reference nor BookShelves eBook Reader shows ads.

### Which is updated more often, Aluminum Quick Reference or BookShelves eBook Reader?

Aluminum Quick Reference ships an update every 7 months, and BookShelves eBook Reader weekly. Most recently, Aluminum Quick Reference was updated on October 24, 2026 and BookShelves eBook Reader on October 24, 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.*