Delta. Modern ebook reader 4+

Read best books 2017


Designed for iPad

    • 4.2 • 91 Ratings
    • Free
    • Offers In-App Purchases



*** Today you can download it for free! ***

Read your favorite books in a modern ereader app that is truly enjoyable to use!

– Supported ebook formats:
The app supports pdf, epub, fb2 and txt. More coming soon.
The pdf format is available on devices running iOS 11 or later.

– About the app:
The app is made to be incredibly convenient and easy to use. Once start reading, you can access all of the app's features without closing the book! Almost all of the control elements are located at the bottom of the screen, so you don't have to shift your grip and reach for the upper side, which is especially important when using bigger devices. Some of the features are easily accessible by gestures. For example, you can pull the book list down with an elegant animation to search for a book or pull currently opened book down to add a bookmark or check the time.
Just try it, it's really convenient!

– eReader features:
The app has all the necessary eReader features:
You can choose a font and adjust its size, choose reading mode (page turning or vertical scrolling), lock the screen orientation, choose a color theme (light, sepia or dark), adjust screen brightness, use table of contents, bookmarks and quotes, easily find text in a book or a book in your library, view page numbers and utilize fast navigation tool to jump to any page in a book you want.
The app also provides a custom neat context menu for the actions you can perform with the text.

– iCloud synchronization:
This feature makes your books and bookmarks available on all your devices connected to the same iCloud account. So you can start reading a book on your iPad and continue on your iPhone later right from the place where you left off.
Internet connection is required.

If you have a question or an issue with the app please email me at

Download now and enjoy a great reading experience!

What’s New

Version 1.5

This app has been updated by Apple to display the Apple Watch app icon.

Minor fixes and improvements

Ratings and Reviews

4.2 out of 5
91 Ratings

91 Ratings

JClark ,

Fantastic, just a few small suggestions

This is a great ebook app. I've been hunting for an alternative to Apple Books for some time (Books is fantastic, but my wife uses it for collecting things online, and I don't want to be stuck with an Apple app, just in case, and none of my ebooks are from the Apple Book Store). I've tried kyBook 3, Marvin 3, eBoox, PocketBook Reader, tiReader, and Hyphen to name a few. eBoox had the best interface but didn't support PDFs. PocketBook and kyBook are both full featured, but PocketBook chokes on large files and kyBook requires a subscription to sync (a cheap one, but still).
Delta has an interface almost as good as eBoox, runs fast and smooth, and syncs smoothly in the background (using iCloud). It's lacking a lot of features, but nothing that I actually want or need. In short, it's nearly perfect.
I only have a few suggestions (I would be willing to pay extra for these):
1. I'd like to be able to edit the file's metadata
2. I'd like to be able to change how the books in the library are sorted (title, author, etc)
3. It would be nice if the sepia coloring also changed the images in the books (kyBook does this well, it's nice for reading at night)
4. A page curl animation would be a nice touch, but only if it's a real interactive one like Apple Books has, not a faked one
None of these are deal-breakers, clearly. This is a fantastic reader and I think I'll be using it for a long time regardless.

aliy-appid ,


Hopefully, find the right reader after checking many different book-readers. It makes the job done, well. Very good for font settings and quick acess to library and contents. Also, very simple and perfect interface.

Mohsendco ,


please add Persian language fo translator option, non of the book's App don't support us.

App Privacy

The developer, VIKTOR DIACHENKO, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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