# Readest vs Send to X4

The clearest difference is in-app purchases: Send to X4 at none against Readest's 9. Send to X4 also leads on rating (5.0 vs 4.5) and update cadence (daily vs fortnightly). Readest's advantage is ratings volume (195 vs 5) and chart position (#209 vs unranked). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Readest sells 9 in-app purchases, starting at $4.99 per month. Send to X4 asks for nothing beyond the download.

Send to X4 holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Readest has 195 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 84% of Readest's written reviews are positive against 100% of Send to X4's.

Readest ships an update fortnightly, Send to X4 daily. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Readest | Send to X4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (195 ratings)](https://appshunter.io/ios/app/readest-ebook-reader/id6738622779/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/send-to-x4/id6758729873/reviews)** |
| Number of ratings | **195** | 5 |
| Positive reviews | 84.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#209** | — |
| Size | 58 MB | 34 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bilingify LLC](https://appshunter.io/developer/1781524090) | [Jaime Chapinal](https://appshunter.io/developer/1855881822) |

## What reviewers say

### Readest

[App page](https://appshunter.io/ios/app/readest-ebook-reader/id6738622779)

**Currently charting:** #209 Top Free · Book (US App Store)

This app is a powerful ebook reader designed for deep thinkers and researchers. It offers advanced annotation tools, seamless device syncing, and robust library management with OPDS and Calibre support. Enjoy a distraction-free reading experience with customizable modes and multi-book viewing for enhanced study and analysis.

**Highlights:** OPDS Online Libraries, Calibre Integration, Sync Across Devices, Bookshelf Management, Customizable Reading Modes, Multi-Book View, Advanced Annotations & Highlights

**Features:** Family Sharing, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe to Plus Plan | $4.99 | per month |
| Subscribe to Pro Plan | $9.99 | per month |
| Subscribe to Plus Plan | $49.99 | per year |
| Subscribe to Pro Plan | $99.99 | per year |
| 1 GB | $9.99 | one-time |
| 2 GB | $14.99 | one-time |
| Full Customization | $19.99 | one-time |
| 5 GB | $29.99 | one-time |
| 10 GB | $49.99 | one-time |


### Send to X4

[App page](https://appshunter.io/ios/app/send-to-x4/id6758729873)

Wirelessly send articles, notes, and custom screensavers to your e-ink reader. Convert web content to EPUBs, import your own files, and manage content directly on the device. Enjoy a private, cloud-free experience over local WiFi.

**Highlights:** Convert articles to EPUB, Import custom EPUB files, Send text notes, Design custom screensavers, Browse e-ink wallpapers, Manage device files

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

**In-app purchases:** none


## Frequently asked questions

### Is Readest free?

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

### Is Send to X4 free?

Send to X4 is free to download, with no in-app purchases.

### Which has better reviews, Readest or Send to X4?

Send to X4 is rated higher. Readest averages 4.5 out of 5 from 195 ratings, while Send to X4 averages 5.0 from 5 ratings.

### Do Readest or Send to X4 have ads?

Neither Readest nor Send to X4 shows ads.

### Which is updated more often, Readest or Send to X4?

Readest ships an update fortnightly, and Send to X4 daily. Most recently, Readest was updated on October 25, 2026 and Send to X4 on October 24, 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.*