EPUB & PDF reader for iPhone and iPadYour EPUB books on iPhone and iPad, with speed reading built in.
Leo is an ebook reader for the EPUB and PDF files you already own. Read the full chapter as usual or switch to RSVP and let the words come to you, one at a time, at your pace.

How to read EPUB files on iPhone with Leo
No conversions and no store account. If you have the file, you can read it.
- 1
Import your books
Pick EPUB or PDF files from the Files app: iCloud Drive, Dropbox, Google Drive or anything you’ve downloaded. Or connect your Calibre library through OPDS.
- 2
Make the library yours
Keep the original cover, use a photo or pick a color and an icon, so every book is easy to find at a glance.
- 3
Read your way
Choose the theme, typeface, size and spacing. Read the chapter, or press play for one word at a time from 100 to 1,000 words per minute.
Just need to open a single EPUB? On iPhone you can also tap the file in the Files app and share it to Apple Books. Leo is for when you want a library of your own books and a faster, more focused way to read them.
Everything you expect from an ebook reader
EPUB and PDF
Open the DRM-free files you already have, from any source.
Images in context
Illustrations in your EPUB appear right where they belong in the story.
Full text in sync
The RSVP card on top, the full chapter below, always on the same word. Tap any word to jump there.
Fonts for every reader
Including dyslexia-friendly OpenDyslexic and Atkinson Hyperlegible, plus light, dark and black-and-white themes.
Goals and streaks
Daily goals for minutes and words, a streak calendar and your reading speed over time.
Calibre via OPDS
Bring your existing Calibre library to iPhone and iPad without copying files by hand.
Leo vs Apple Books vs Kindle
Apple Books and Kindle are great for buying books. Leo is for reading the ones you already have, faster and with fewer distractions.
| Leo | Apple Books | Kindle app | |
|---|---|---|---|
| Opens your own DRM-free EPUB and PDF | Yes | Yes | Via Send to Kindle |
| Built-in bookstore | No | Yes | Yes |
| Reads books bought on Kindle (DRM) | No | No | Yes |
| RSVP speed reading, one word at a time | Yes | No | No |
| Full text in sync with the current word | Yes | No | No |
| Calibre library via OPDS | Yes | No | No |
Where to get DRM-free EPUB books
Leo reads any EPUB without DRM. These are good places to start:
- Standard Ebooks — Free, carefully formatted editions of public-domain classics.
- Project Gutenberg — Tens of thousands of free public-domain books.
- Humble Bundle — Pay-what-you-want ebook bundles, usually DRM-free.
- Calibre — The free tool to organise your collection and share it with Leo through OPDS.
How fast do you read? Take the reading speed test →Best speed reading apps for iPhone, compared →
EPUB reader questions
What people ask about reading their own books with Leo.

Can I read my Kindle books in Leo?
Not books bought on Kindle: they are protected with DRM and only open in Amazon’s apps. Any DRM-free EPUB or PDF works perfectly.
Does Leo open PDF files too?
Yes. Leo reads both EPUB and PDF files, and you can mix them in the same library.
Does it work on iPad?
Yes, Leo works on iPhone and iPad. There’s no Android version for now.
Do I have to read one word at a time?
No. The full chapter is always on screen below the RSVP card, in sync with the current word, so you can follow the page as usual and press play only when you want.
Can I bring my Calibre library?
Yes. Connect Calibre or any other OPDS catalog and import books from it directly.
When can I download Leo?
Leo is coming to the App Store soon. Join the waitlist and we’ll email you the day it launches.
Another question? Write to us at adrianromero@ireadwithleo.com
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