spoktReader guide
The Audiobook Player With Synced Text for Your Own Files
You own audiobook files — LibriVox downloads, indie-store purchases, CD rips, lecture recordings — and most apps treat them as an afterthought. The streaming players can't see them; the podcast apps mangle their chapters; and the one feature that makes a modern audiobook feel modern — the text on screen, synced to the narration — has been locked inside Amazon's ecosystem. This page is the honest shopping list: what a files-first audiobook player must do, which apps do it, and how to get word-synced read-along text for files you already own.
What a files-first audiobook player must do
Before the synced-text question, the basics — the checklist Voice Dream refugees and BookPlayer fans already know by heart:
- Real import: open files straight from the Files app (share → play), accept MP3, M4B, M4A, WAV, and read M4B chapter markers automatically.
- Books, not tracks: multiple files become one book with chapters — and stay reorderable, renameable, combinable, and splittable after import.
- A library that respects you: folders, progress on every cover, resume exactly where you stopped — offline, always.
- A real player: speed control, sleep timer, bookmarks, lock-screen controls.
BookPlayer, free and open source, earned its reputation by nailing that list for pure playback. The next tier up is where the field thins out fast.
The synced-text tier: who actually does it
Text on screen, highlighted in time with your own narration, requires forced alignment — matching the audio against the book's text. Four consumer tools do it today, with very different costs of admission:
| App | Plays your files | Synced text | Precision | Needs | Price |
|---|---|---|---|---|---|
| BookPlayer | Yes — excellent | No | — | Nothing | Free, open source |
| Storyteller | Via its own reader apps | Yes | Sentence | Self-hosted server, EPUB only | Free, open source |
| Voxlight | Yes | Yes | Chapter on iPhone; word-level via Mac app | A Mac for word-level; EPUB only | Free to 5 books; $19.99/yr launch or $49.99 lifetime |
| Spokt | Yes | Yes | Word-level, on the phone | Nothing — PDF or EPUB both work | Free tier; optional Plus or one-time lifetime |
The full teardown of the sync tools — including Amazon's Whispersync and the command-line option — lives in our synced-text audiobooks guide. The one-line summary holds: Spokt is the only one that does word-level highlighting entirely on the iPhone, with no server, no Mac, and no EPUB-only restriction.
How Spokt treats your files — first-class, start to finish
- Share, don't export — select your audio in the Files app (several at once, the book's PDF alongside if you like), share to Spokt, and it opens straight into the import. Or pick files or scan a whole folder from the library.
- Shape the book — combine files into one chaptered audiobook or keep them separate; rename, reorder chapters, add parts as you get them, split books back apart. Nothing about an import is locked in.
- Attach the text — a PDF or EPUB rides along at import or gets attached later from the book's page; the original PDF stays one tap away in the player.
- Generate the synced transcript — the alignment runs against your narration and the words light up karaoke-style as it plays. The free tier includes monthly sync minutes to try it on a real book.
- Listen like it's yours — offline playback, progress kept across sessions and app updates, speed control, sleep timer, and your library organized in folders with progress on every cover.
Frequently asked questions
What is the best audiobook player for my own files on iPhone?
For pure playback, BookPlayer is a beloved free open-source option. If you also want the book's text on screen, word-synced to your narration, Spokt is the player built for that — share the files from the Files app, attach the PDF or EPUB, and the alignment happens on the phone.
Can I play Audible files in these apps?
No — Audible files are DRM-protected and only play in Amazon's apps. Every player on this page works with DRM-free audio: indie-store purchases, LibriVox, CD rips, or your own recordings.
Does it work offline?
Playback is fully offline in Spokt — imported files are copied in, survive app updates, and your position is saved locally, so an offline session never loses progress. Generating a new synced transcript needs a connection to start.
What audio formats are supported?
MP3, M4B (chapter markers read automatically), M4A, WAV, and AAC. Multiple files become one chaptered book or separate books — your choice — and you can add parts or documents later from the book's page.