Now in TestFlight beta

A reader for the
slow web.

Kios is a calm, native home for the books you actually want to finish — your own EPUBs, beautifully set and quietly tracked.

Join the TestFlight beta
The Kios home screen showing today's reading and your library

What's inside.

Built for finishing books, not collecting tabs.

Reading

An undistracted page.

Edge-to-edge typography in a typeface you choose. Tap once for chapter progress and controls — tap again, and they're gone.

  • Highlight and annotate inline
  • Tap-to-reveal controls & chapter scrubber
  • Paper and night themes
  • Choose your serif and text size
A book open in the Kios reader, with reading-time left in the book

Library

Your whole shelf, at a glance.

Pick up exactly where you left off. Covers, progress, and time-to-finish for everything you're in the middle of.

  • Continue reading, right at the top
  • Import your own EPUBs from Files
  • Progress and percentage per book
  • Filter by reading, unread or finished
The Kios today screen with continue-reading and library

Statistics

Reading, measured gently.

A streak worth keeping, read-time that quietly adds up, and a full year of reading days — without turning a good habit into a leaderboard.

  • Daily streak and read-time
  • A year of reading days
  • Week, month, year and all-time
  • Personal records, kept on your device
The Kios statistics screen showing read time, pages and reading days

Sync.

Already keep a reading position on KOReader or Kobo?

Kios speaks both KOReader Sync and Kobo Sync, so your place follows you between Kios and the e-reader on your nightstand.

Questions.

Good to know before you board.

What is Kios?
Kios is a native iOS reader for the EPUBs you already own. No store, no feed, no recommendations — just a calm place to keep, read and finish your own books, with type and themes you control.
How do I join the beta?
Kios is currently invite-free on Apple TestFlight. Open the TestFlight link, install Apple's TestFlight app if you don't have it, and you'll get every new build automatically.
Which formats does it read?
Kios reads EPUB. Import your books straight from Files, iCloud Drive or any share sheet — they live in your library on your device.
Can it sync with my e-reader?
Yes. Kios supports both KOReader Sync and Kobo Sync, so your reading position stays in step between Kios and your e-reader.
Where are my books and data stored?
On your iPhone. Your library, highlights and statistics stay on the device — nothing is uploaded unless you choose to turn on sync. More detail in our privacy policy.
Does it cost anything?
Kios is free while it's in beta, with no ads and no tracking. Pricing after launch hasn't been decided yet — beta readers will hear first.

Now in TestFlight beta.

Start reading today.

Bring your own books to a quieter shelf. We'd love your notes from the margins.

Join the TestFlight beta