# Elsevier eLibrary Reader vs Didactus

The clearest difference is in-app purchases: Elsevier eLibrary Reader at none against Didactus's 2. Elsevier eLibrary Reader also leads on iOS requirement (13.0 vs 15.1). Didactus's advantage is update cadence (every 6 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Didactus sells 2 one-off in-app purchases. Elsevier eLibrary Reader asks for nothing beyond the download.

Elsevier eLibrary Reader ships an update every 4 months, Didactus every 6 weeks. The most recent releases landed on October 16, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Elsevier eLibrary Reader | Didactus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (79 ratings)](https://appshunter.io/ios/app/elsevier-elibrary-reader/id893996694/reviews)** | — |
| Number of ratings | **79** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 62 MB | 35 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Elsevier (Singapore) Pte Ltd](https://appshunter.io/developer/551008824) | [KEITH MICHAEL BLEVINS](https://appshunter.io/developer/1872107809) |

## What reviewers say

### Elsevier eLibrary Reader

[App page](https://appshunter.io/ios/app/elsevier-elibrary-reader/id893996694)

Access and read Elsevier's ebooks on your mobile devices. Organize your library into shelves, customize your reading experience with notes and highlights, and easily navigate through content. Download books directly from the eLibrary website.

**Highlights:** Read Elsevier ebooks on mobile, Organize books into shelves, Customize reading experience, Add notes and highlights, Bookmark pages, Search for keywords, Navigate via table of contents

**In-app purchases:** none

**What reviewers complain about**

- ❌ Unable to log in
- ❌ Invalid credentials error
- ❌ App is useless
- ❌ Frustrating user experience
- ❌ Falling behind technologically

**Reported bugs**

- Login failure
- Invalid login credentials
- App does not work
- Cannot sign into apps
- Credentials not being accepted

**Requested features**

- Fix the login issue
- Improve app functionality
- Make the app compatible with online books


### Didactus

[App page](https://appshunter.io/ios/app/didactus/id6758306095)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LVN NCLEX Module | $39.99 | one-time |
| Registered Nurse NCLEX Prep | $69.99 | one-time |


## Frequently asked questions

### Is Elsevier eLibrary Reader free?

Elsevier eLibrary Reader is free to download, with no in-app purchases.

### Is Didactus free?

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

### Do Elsevier eLibrary Reader or Didactus have ads?

Neither Elsevier eLibrary Reader nor Didactus shows ads.

### Which is updated more often, Elsevier eLibrary Reader or Didactus?

Elsevier eLibrary Reader ships an update every 4 months, and Didactus every 6 weeks. Most recently, Elsevier eLibrary Reader was updated on October 16, 2026 and Didactus on September 29, 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.*