Local TTS is a text-to-speech app for iPhone and iPad that generates every voice on the device itself, so documents are never uploaded, nothing is metered in words or characters, and reading works with the network off. This page compares it with the apps people most often weigh it against — including the cases where they are the better pick.
MethodologyPrices and limits were checked on
Every difference below follows from one thing: where the words are turned into audio. If that happens on a server, the app needs a connection, an account, and a way to charge for the compute — which is where word allowances, daily character limits, and $139-a-year plans come from. If it happens on your iPhone, none of those exist, and the cost moves to hardware requirements and a smaller voice catalog instead.
Neither answer is automatically right. What follows is which app fits which answer, with the numbers checked against each vendor's own pages.
Speechify Inc.
Speechify is a cross-platform reading service. One library follows you across iOS, Android, Mac, Windows, the web, and browser extensions, with a cloud voice catalog and AI summaries, chat, and podcasts on top of text to speech.
NaturalSoft Ltd.
NaturalReader is an established cross-platform reading service: iOS and Android apps, a web app, and a Chrome extension share one library, with more than 200 AI voices in over 90 languages converted on its servers.
ElevenLabs, Inc.
ElevenReader is ElevenLabs' consumer reading app: more than 1,000 cloud voices in 30-plus languages, a store of over 200,000 premium audiobooks, and iOS, Android, web, and Chrome versions sharing one account.
Voice Dream LLC
Voice Dream Reader is a veteran iOS and Mac reader built around accessibility: an Apple Design Award winner with Bookshare and DAISY support, annotations, a pronunciation dictionary, and a voice catalog that runs offline.
Looking for a ranked roundup instead of a switching guide? See the best text-to-speech apps for iPhone, or what "offline" actually means across ten iPhone TTS apps. The naturalness and accuracy numbers behind the two on-device models are in the Kokoro-82M and Supertonic 3 benchmarks.
The trade-off is hardware: Local TTS needs iOS or iPadOS 18.6 and an iPhone 12 or later, and there is no Android, Windows, or web version. Full specifications are on the official facts page.
It depends on what "offline" has to mean. Local TTS generates all 38 of its voices on the device with Kokoro-82M and Supertonic 3, so new speech works in airplane mode. Voice Dream Reader also runs its voices on the device, so the question against it is price rather than connectivity. Speechify ships on-device iOS voices inside a larger cloud service, so part of it works offline and part does not. NaturalReader and ElevenReader convert text on their servers and play downloaded audio offline.
Because every word costs them GPU time on a server. Speechify guarantees at least 150,000 Premium Voice words a month, NaturalReader meters daily characters by voice tier, and ElevenReader meters listening hours. An app that synthesizes on your own hardware has no per-word cost to recover, which is why Local TTS Pro sets no cap.
For occasional use, often yes — iOS Accessibility can, in Apple’s words, "hear iPhone speak the screen, selected text, and typing feedback", and it costs nothing. It reads what is on screen rather than keeping a library: there is no document import, no per-note voice, no audio export, and no neural voice catalog. A dedicated reader is worth it when you listen to long documents regularly.
Not automatically. The models Local TTS uses publish their own naturalness and accuracy benchmarks, which is what our benchmark write-up covers. What on-device processing does cost is catalog size: 38 voices across 31 languages, against the hundreds a cloud service can host.
Your source files stay yours — the same PDFs, EPUBs, and Word documents import straight into Local TTS. Anything that exists only inside another app, such as notes, highlights, or converted audio, needs exporting from that app first; Local TTS cannot read another reader’s library.
Local TTS is a free download. Import a PDF, switch on airplane mode, and hear how it reads before you change anything about your setup.
Download Local TTS free
