# PDF Reader vs Aviation eLog Book

The clearest difference is price: PDF Reader at Free against Aviation eLog Book's $3.99. PDF Reader also leads on update cadence (every 2 months vs every 4 months). Aviation eLog Book's advantage is review sentiment (100% vs 77%). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

PDF Reader is free to download; Aviation eLog Book costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PDF Reader ships an update every 2 months, Aviation eLog Book every 4 months. The most recent releases landed on November 12, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | PDF Reader | Aviation eLog Book |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.3 (3.9K ratings)](https://appshunter.io/ios/app/pdf-reader-pdfelement/id1150215996/reviews)** | — |
| Number of ratings | **3.9K** | — |
| Positive reviews | 76.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 173 MB | 113 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Wondershare Technology (Hunan) Co.,Ltd.](https://appshunter.io/developer/1721309409) | [Terry Billingsley](https://appshunter.io/developer/593356509) |

## What reviewers say

### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-pdfelement/id1150215996)

This app offers a superior PDF reading experience with its innovative Liquid Mode, which optimizes documents for mobile screens. It also provides robust tools for annotating, signing, managing, and sharing your PDF files, catering to both work and study needs.

**Highlights:** Liquid Mode for optimized mobile reading, Annotation tools (pencil, text, highlighting), Handwritten signature insertion, File management (move, merge, copy, delete), Cloud service integration (Wondershare, iCloud), Create blank PDFs and folders

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Efficient PDF editing
- 💡 Useful annotation tools
- 🚀 Convenient for students/professionals
- 👍 Great value for free app

**What reviewers complain about**

- 🐛 Crashes and glitches
- 🔒 Privacy concerns with account requirement
- 👎 Unintuitive user interface
- 🐛 Unreliable saving/syncing
- 👎 Limited functionality compared to paid version

**Reported bugs**

- Text boxes appearing randomly
- Inability to select/edit text in some PDFs
- Scrolling issues and page loading delays
- Incompatibility with certain PDF formats

**Requested features**

- Ability to edit text formatting (font, size, color)
- Support for multiple open documents
- Improved Apple Pencil integration
- Bookmark/favorite feature for frequently used PDFs
- Expanded cloud storage integration (OneDrive, Google Drive, etc.)


### Aviation eLog Book

[App page](https://appshunter.io/ios/app/aviation-elog-book/id1642589742)

This digital logbook replaces physical aviation logs, allowing pilots to easily record and access flight details. It offers quick summaries of flight times, totals, and search capabilities for specific entries, with export and printing options for data backup.

**Highlights:** Digital flight time recording, Calendar and logbook views, Monthly and grand total hours, Searchable trip and endorsement logs, Export to CSV, TAB, XLS, Print to PDF, Flight time calculator

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF Reader free?

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

### Is Aviation eLog Book free?

Aviation eLog Book costs $3.99, with no in-app purchases.

### Do PDF Reader or Aviation eLog Book have ads?

Neither PDF Reader nor Aviation eLog Book shows ads.

### Which is updated more often, PDF Reader or Aviation eLog Book?

PDF Reader ships an update every 2 months, and Aviation eLog Book every 4 months. Most recently, PDF Reader was updated on November 12, 2026 and Aviation eLog Book on November 4, 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.*