Readest
An app that syncs your EPUB and PDF books across phone, computer and web.
What Readest does
Readest is a newer, open-source ebook reader for EPUB and PDF files. It runs on iPhone, iPad, Android, Mac, Windows, Linux and the web, and syncs your progress, highlights and notes between them. The free plan covers most readers, with paid plans for more storage and translation.
Readest is a good answer if you want to read your own EPUB files on iPhone and pick them up later on a laptop or Android tablet. Your reading progress, highlights and notes sync across every platform, and the free plan includes 500 MB of cloud storage for your books.
It has the tools a serious reader wants: custom fonts and layouts, notes, Wikipedia lookup, translation powered by DeepL, and AI read-aloud for when you'd rather listen. It also connects with tools like calibre, KOReader, Readwise and Obsidian.
The paid plans are mostly about scale. Plus is $4.99 a month and Pro is $9.99 a month, with more storage, more daily translation and extra voices. It's open source, and it's still young, so it has far fewer App Store ratings than the big names.
Alternatives to Readest
Who it's for
Skip it if: Anyone looking for a store or free library books.
Pricing
Free planFree plan with sync, 500 MB of storage and AI read-aloud. Plus costs $4.99 a month and Pro $9.99 a month. A one-time $19.99 add-on brings more customization and syncing through your own cloud storage.
Prices can vary by country. Checked 16 Oct 2026.
What people like
- Runs on almost every platform
- Generous free plan with sync
- Open source and actively updated
Watch out for
- Newer app with few ratings so far
- Only EPUB and PDF
- Translation and storage limits on the free plan
Want a reader built around how you take notes? Build your own.
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Try this idea: “a reading app where I import my EPUBs, highlight passages, and get a weekly list of everything I highlighted”
Questions people ask
Is Readest free?
Yes. The free plan includes sync across devices, 500 MB of cloud storage and AI read-aloud.
Can I read EPUB on iPhone with Readest?
Yes. It opens EPUB and PDF files on iPhone and iPad, and syncs them to your other devices.
Is Readest open source?
Yes. Its code is public on GitHub.