Listen and read English with sentence sync

SentiaRead reads any text aloud in a natural neural voice, and plays EPUB3 Media Overlay audiobooks where a book ships with one. The sentence being spoken highlights as it goes. Tap a word to pause and see what it means here without losing your place, and pick the same sentence up on your other devices.

Available on iPhone, iPad, Android, Mac, Windows, E-Ink, and Chrome.

Continuous natural neural read-aloud with sentence follow-highlight

Listen to any imported EPUB book, PDF, saved web article, or podcast transcript. A neural voice reads with natural phrasing while the sentence being spoken highlights in step. Speed runs from 0.5x to 2.0x, with presets a tap away.

Import EPUB3 audiobooks with authentic studio narration sync

Read EPUB3 books with embedded Media Overlays to experience studio narration from native speakers. Words and sentences sync precisely with the narrator's voice, giving you the natural cadence, emotion, and nuance of a professionally produced audiobook.

In-place lookups while listening, with cross-device audio sync

Encounter an unfamiliar word while listening? Tap it anytime to pause and see its exact contextual meaning in place. Reading progress syncs across iPhone, iPad, Android, Mac, Windows and e-ink; audio position follows you across every device that plays audio.

How it differs from generic TTS apps and audio players

Both high-quality neural TTS and native EPUB3 studio audiobooks

Enjoy natural AI neural voices on any imported text or article, plus native support for EPUB3 audiobooks featuring professional human studio narration — tailored for both extensive listening and intensive study.

Sentence-level sync highlights integrated with instant in-context AI lookup

Visual highlights follow the spoken audio sentence by sentence. When something is unclear, tap in place to understand the exact meaning. Comprehensible listening transforms passive noise into real language acquisition.

Cross-device cloud sync for reading progress and audio playback positions

Start listening on your phone during your commute and pick up at the same sentence on your tablet or desktop at home — or carry on reading it on your e-ink reader. Progress, audio locators and saved vocabulary stay in sync.

Frequently Asked Questions

What are EPUB3 Media Overlays audiobooks?
EPUB3 Media Overlays is an open standard that binds audio recordings (such as human voice actor narration) to book text using SMIL synchronization. When you open a compatible EPUB3, SentiaRead highlights each sentence as the authentic narrator reads it.
Can I listen with the screen off?
EPUB3 audiobooks, yes — they keep playing with the screen locked or in another app, with controls on the lock screen and in the notification centre. Neural-voice read-aloud is different: it runs in the foreground and pauses when you leave the app, so it is built for reading along rather than for listening with the phone in your pocket.
Can I adjust playback speed and switch voices?
You can read in American or British English, and set the speed anywhere from 0.5x to 2.0x with presets for the usual ones. EPUB3 audiobooks change speed the same way, without distorting the pitch.
What happens when I look up a word while listening?
Tapping any word on the page automatically pauses playback and opens the in-context explanation card. Once you grasp the meaning, resume playback with a single tap from the exact same sentence.
Do read-aloud and audiobooks work offline?
EPUB3 audiobooks with bundled audio files play completely offline. For AI continuous neural TTS, downloaded book text is always available, while audio generation streams on demand over an internet connection.

Works together with

Put on your headphones and immerse yourself in reading and listening.