# ReadSync vs PDF Highlighter & Markup

The clearest difference is in-app purchases: PDF Highlighter & Markup at none against ReadSync's 1. ReadSync's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. ReadSync sells 1 one-off in-app purchase. PDF Highlighter & Markup asks for nothing beyond the download.

## The numbers

| Metric | ReadSync | PDF Highlighter & Markup |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | — | Monthly |
| Size | 4 MB | 10 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Alper Albayrak](https://appshunter.io/developer/993200227) | [Bokeria](https://appshunter.io/developer/1425332310) |

## What reviewers say

### ReadSync

[App page](https://appshunter.io/ios/app/readsync-pdf-reader/id6761561640)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $19.99 | one-time |


### PDF Highlighter & Markup

[App page](https://appshunter.io/ios/app/pdf-highlighter-and-markup/id6779879391)

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

**In-app purchases:** none


## Frequently asked questions

### Is ReadSync free?

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

### Is PDF Highlighter & Markup free?

PDF Highlighter & Markup is free to download, with no in-app purchases.

### Do ReadSync or PDF Highlighter & Markup have ads?

PDF Highlighter & Markup shows ads; ReadSync does not.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*