# Universal PDF vs Read Master

The clearest difference is in-app purchases: Read Master at none against Universal PDF's 3. Universal PDF's advantage is ratings volume (933 vs 22) and chart position (#34 vs unranked). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Universal PDF sells 3 in-app purchases, starting at $3.99 per 7 days. Read Master asks for nothing beyond the download.

Read Master holds the better App Store score, 3.9 against 3.7. That said, the two scores are not equally well evidenced: Universal PDF has 933 ratings behind it against 22, so its average is the more settled of the two. Written reviews complicate that: 10% of Universal PDF's written reviews are positive against 0% of Read Master's, so the app with the better star average is not the one people write more warmly about.

Universal PDF ships an update monthly, Read Master every 5 weeks. The most recent releases landed on September 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Universal PDF | Read Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (933 ratings)](https://appshunter.io/ios/app/universal-pdf/id6451441983/reviews) | **[3.9 (22 ratings)](https://appshunter.io/ios/app/read-master-flowpdf/id6467105556/reviews)** |
| Number of ratings | **933** | 22 |
| Positive reviews | **9.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#34** | — |
| Size | 41 MB | 43 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [GRAND CHALLENGE NETWORK TECHNOLOGY LIMITED](https://appshunter.io/developer/1691275976) | [EIGHT PUNCH(HONGKONG)CO.,LIMITED](https://appshunter.io/developer/1696585489) |

## What reviewers say

### Universal PDF

[App page](https://appshunter.io/ios/app/universal-pdf/id6451441983)

**Currently charting:** #34 Top Free · Business (US App Store)

Transform your phone into a versatile document scanner and manager. Easily capture, merge, split, compress, and convert documents and images to PDF format. Streamline your workflow for efficient document handling.

**Highlights:** Scan documents with ease, Merge multiple images into one PDF, Split existing PDF files, Compress PDF file sizes, Convert images to PDF format, Reduce impact of angled shots and low light

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Membership | $3.99 | per 7 days |
| Monthly Membership | $12.99 | per month |
| Annual Membership | $39.99 | per year |

**What reviewers like**

- ⭐ Positive reviews
- 🇹🇭 App works in Thai language

**What reviewers complain about**

- 🚫 App does not work as advertised
- 💢 Excessive ads and poor user experience
- 🔇 No sound or audio functionality
- 🤯 Difficult to navigate and find content

**Reported bugs**

- App crashes or freezes
- Broken links and missing content

**Requested features**

- Improve ad-free experience
- Provide clear information about app functionality


### Read Master

[App page](https://appshunter.io/ios/app/read-master-flowpdf/id6467105556)

This app allows users to efficiently create, merge, share, and edit PDF documents. It functions as a text editor, reader, and scanner to streamline paperless workflows.

**Highlights:** Create PDF documents, Merge PDF documents, Share PDF documents, Modify PDF documents, Text editing, Document scanning

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Universal PDF free?

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

### Is Read Master free?

Read Master is free to download, with no in-app purchases.

### Which has better reviews, Universal PDF or Read Master?

Read Master is rated higher. Universal PDF averages 3.7 out of 5 from 933 ratings, while Read Master averages 3.9 from 22 ratings.

### Do Universal PDF or Read Master have ads?

Neither Universal PDF nor Read Master shows ads.

### Which is updated more often, Universal PDF or Read Master?

Universal PDF ships an update monthly, and Read Master every 5 weeks. Most recently, Universal PDF was updated on September 24, 2026 and Read Master on September 9, 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.*