Comparison · October 2026
Free readers that use your phone’s voice, apps with natural AI voices, and an audiobook app that gives every character in a book their own voice — what each one is good for.
Written by the Lyraboo team, so we are not neutral. Facts about the other apps come from their own websites and Google Play listings, checked in October 2026.
| App | Voices | Character voices | Offline | Price |
|---|---|---|---|---|
| Lyraboo | Cloud AI voices | Yes — every character, automatically | No | 1 hour a month free, then a plan |
| ReadEra, Moon+ Reader, Librera | The phone’s text-to-speech | No — one voice | Yes | Free (some with a paid upgrade) |
| @Voice Aloud Reader | Phone voices, or cloud with your own key | Alternating voices you set up | With phone voices | Free with ads; $15 once |
| Speechify | Cloud AI voices | No — one voice | Not stated | 10 basic voices free; $29 a month |
| ElevenReader | ElevenLabs AI voices | No — one voice you choose | Paid plan | 10 hours a month; $11 a month |
| NaturalReader | Cloud AI voices | No — one voice | Mobile app | Free forever plan |
| Paper2Audio | Cloud AI voices | No — one voice | Downloaded audio | 56 hours a week |
ReadEra, Moon+ Reader and Librera are good ebook readers that also open PDFs. Their read-aloud button hands the text to the text-to-speech engine installed on the phone — the same voice that reads notifications. It is free and works offline, and for a manual or an article it is enough. Over a whole book it wears thin: one flat voice for narration, every character and every chapter heading. @Voice Aloud Reader uses the same phone voices (or cloud voices with your own API key), can alternate voices between narration and quotes once you set it up, and records MP3. More in Moon+ Reader, ReadEra and Librera TTS alternative.
Speechify, ElevenReader and NaturalReader read PDFs in natural cloud voices on Android as well as iPhone and the web, and Paper2Audio specialises in papers: it skips footnotes and references and explains tables and maths. They pick one voice for the whole text — right for reports, articles and study notes. Compared in detail: the best apps to turn a PDF into an audiobook.
A novel read in one voice makes you work out who is speaking from the words alone. Lyraboo turns the PDF into an audiobook with a full cast instead: it finds every character, attributes each line of dialogue to the one who says it and gives each their own AI voice for the whole book, with a narrator for the rest. You hear a scene, not a list of sentences.
It plays like a music app — chapters, 0.25×–3× speed, lock-screen controls, resume where you stopped — and the text scrolls under the player like song lyrics, words lighting up as they are spoken, each line labelled with its speaker; tap a word to jump there. Upload the PDF and the first chapter plays in about one to two minutes. Limits: needs a connection, no MP3 export, PDFs need real text (no OCR), and the free plan is one hour a month. More: PDF to audiobook app.
Android’s Select to Speak (Settings → Accessibility) reads whatever is on the screen, including a PDF open in any viewer. It is handy for a page or two, not for a book. On a computer, Microsoft Edge’s Read aloud does the same for PDFs opened in the browser. Every free option side by side: free text to speech apps for books and PDF to speech converters.
ReadEra, Moon+ Reader, Librera, @Voice Aloud Reader, Speechify, ElevenReader, NaturalReader, Paper2Audio, Microsoft Edge and Android are trademarks of their respective owners. Lyraboo is an independent app and is not affiliated with, sponsored by, or endorsed by any of them. This comparison reflects publicly available product information.
The things people notice in the first chapter — and the reasons they stay.
Lyraboo’s AI finds every character in the book and casts a distinct voice for each — automatically, for every book. You always know who is speaking, and dialogue sounds like a real conversation instead of one narrator doing all the parts. Most reading and text-to-speech apps use one voice for everything.
Under the player, the book scrolls with the voice the way song lyrics do in Spotify: words light up as they are spoken, each line shows who says it, and tapping any word jumps there.
Chapters, speed from 0.25× to 3×, background playback with lock-screen controls, and it picks up exactly where you stopped.
Pick an EPUB, PDF or TXT and there is nothing to set up: the first chapter is ready in about one to two minutes, and the rest generate while you listen.
Novels, fanfiction and web-serial exports, indie ebooks, study PDFs — plus over 1,000 English classics already in the app.
One free hour of listening every month, no card needed. Hours are spent once per chapter — replaying is always free.
ReadEra, Moon+ Reader and Librera open PDFs and read them with your phone’s text-to-speech voice, free and offline; @Voice Aloud Reader does the same, free with ads. For natural AI voices with a free plan: Paper2Audio (56 hours a week), ElevenReader (10 hours a month) and NaturalReader. Lyraboo gives one hour a month of full-cast narration free.
Open the PDF in a reader with a read-aloud button — ReadEra, Moon+ Reader, Librera or @Voice Aloud Reader — and press play. Without an app, Android’s Select to Speak accessibility feature reads what is on the screen. For a book you want to listen to like an audiobook, upload the PDF to Lyraboo.
In Settings, search for “Text-to-speech output”, choose Speech Services by Google and download the higher-quality voice for your language. It helps, but it is still one voice for everything. Apps with cloud AI voices sound far more natural.
Lyraboo does it automatically: it works out which character says each line and gives each one their own AI voice for the whole book. @Voice Aloud Reader can alternate two voices between narration and quotes once you set it up. The others read in one voice.
The readers that use the phone’s voice — ReadEra, Moon+ Reader, Librera and @Voice with phone voices. NaturalReader’s app has an offline mode, ElevenReader allows downloads on its paid plan and Paper2Audio plays downloaded audio. Lyraboo needs a connection.
Upload a book you own and let the app turn it into a multi-voice audiobook automatically.