# PDF Editor ,PDF Book Reader ® vs RNN Amplifier

The clearest difference is price: PDF Editor ,PDF Book Reader ® at Free against RNN Amplifier's $1.99. PDF Editor ,PDF Book Reader ® also leads on update cadence (every 3 days vs every 40 months) and ratings volume (22K vs 1). RNN Amplifier's advantage is rating (5.0 vs 4.3) and in-app purchases (none vs 6). On ads there is nothing between them.

PDF Editor ,PDF Book Reader ® is free to download; RNN Amplifier costs $1.99 up front. PDF Editor ,PDF Book Reader ® sells 6 in-app purchases, starting at $9.99 per month. RNN Amplifier asks for nothing beyond the download.

RNN Amplifier holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: PDF Editor ,PDF Book Reader ® has 22K ratings behind it against 1, so its average is the more settled of the two.

PDF Editor ,PDF Book Reader ® ships an update every 3 days, RNN Amplifier every 40 months. The most recent releases landed on October 28, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | PDF Editor ,PDF Book Reader ® | RNN Amplifier |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.3 (22K ratings)](https://appshunter.io/ios/app/pdf-editor-pdf-book-reader/id1354910662/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rnn-amplifier/id1521187386/reviews)** |
| Number of ratings | **22K** | 1 |
| Positive reviews | 82.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 40 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 36 MB | 2 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Milad Fakhr](https://appshunter.io/developer/380865844) | [AlgorKorea Co., Ltd.](https://appshunter.io/developer/1173452285) |

## What reviewers say

### PDF Editor ,PDF Book Reader ®

[App page](https://appshunter.io/ios/app/pdf-editor-pdf-book-reader/id1354910662)

This app offers a comprehensive suite of tools for managing PDF documents. It allows users to read, edit, annotate, convert, and scan PDFs with an intuitive interface. Features include form filling, digital signatures, page management, and robust sharing options across Apple devices.

**Highlights:** Read and edit PDFs, Annotate and markup documents, Fill forms and add digital signatures, Convert images and web pages to PDF, Scan documents with OCR, Organize and manage PDF library, Share via AirDrop and iCloud

**Features:** Family Sharing, Siri integration, Apple Watch app, iMessage stickers, SharePlay, iPhone Duo support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $9.99 | per month |
| Quarterly Subscription | $19.99 | per 3 months |
| Yearly Subscription | $49.99 | per year |
| Scanner (OCR) | $3.99 | one-time |
| PDF Editor Creator  & Scanner | $49.99 | one-time |
| Lifetime Access | $99.99 | one-time |

**What reviewers like**

- 🚀 Easy to use and navigate
- 👍 Helpful for signing documents
- 🚀 Efficient PDF editing and management
- 🚀 Reliable performance and compatibility
- 👍 Useful for reading and annotating PDFs

**What reviewers complain about**

- 🐛 Issues with saving edits and text input
- 🐛 Occasional crashes or freezes
- 🔒 Concerns about privacy and data collection

**Reported bugs**

- Text not saving properly after editing
- Difficulty accessing documents at the bottom of PDFs

**Requested features**

- Add folder organization for PDFs
- Improve text editing and input responsiveness
- Provide more customization options for PDF viewing
- Integrate with cloud storage services


### RNN Amplifier

[App page](https://appshunter.io/ios/app/rnn-amplifier/id1521187386)

This app amplifies sound for users with hearing loss, utilizing advanced noise reduction and automatic gain control. It requires earphones or a Bluetooth headset for optimal performance and is designed for real-time, high-quality audio.

**Highlights:** Personal Sound Amplifier (PSA), Noise Reduction, Automatic Output Gain Control, Real-time processing, High sound quality, Earphone/Bluetooth headset required

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PDF Editor ,PDF Book Reader ® free?

PDF Editor ,PDF Book Reader ® is free to download, with in-app purchases available.

### Is RNN Amplifier free?

RNN Amplifier costs $1.99, with no in-app purchases.

### Which has better reviews, PDF Editor ,PDF Book Reader ® or RNN Amplifier?

RNN Amplifier is rated higher. PDF Editor ,PDF Book Reader ® averages 4.3 out of 5 from 22K ratings, while RNN Amplifier averages 5.0 from 1 ratings.

### Do PDF Editor ,PDF Book Reader ® or RNN Amplifier have ads?

Neither PDF Editor ,PDF Book Reader ® nor RNN Amplifier shows ads.

### Which is updated more often, PDF Editor ,PDF Book Reader ® or RNN Amplifier?

PDF Editor ,PDF Book Reader ® ships an update every 3 days, and RNN Amplifier every 40 months. Most recently, PDF Editor ,PDF Book Reader ® was updated on October 28, 2026 and RNN Amplifier on October 5, 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.*