Sandbook: Natural Voice Reader

Sandbook: Natural Voice Reader

Text to Speech, Read Aloud TTS

77 ratings
24 reviews
Free

Price history


Details

  • Released
  • Updated
  • May 18, 2025
  • October 6, 2026

Features

Sandbook: Natural Voice Reader video #1 for iPhone
Sandbook: Natural Voice Reader screenshot #2 for iPhone
Sandbook: Natural Voice Reader screenshot #3 for iPhone
Sandbook: Natural Voice Reader screenshot #4 for iPhone
Sandbook: Natural Voice Reader screenshot #5 for iPhone
iphone
ipad
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About

This app converts text into natural-sounding speech using an on-device model. Read ePub, PDF, and TXT files, type or paste text, or even read webpages aloud. Export audio files for offline listening with complete privacy.

✓On-device text-to-speech
✓Reads ePub, PDF, TXT files
✓Type or paste text
✓Read webpages aloud
✓Export audio files
✓Privacy protection
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What's New in Sandbook

1.0.5

October 6, 2026

Sandbook 1.0.5 • Fixes a crash that could occur during playback. • Support for more document formats, including Word (.docx). • Bug fixes and performance improvements. Chapters prepared for the lock screen will need to be prepared again after this update.

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User reviews

Ok but …

I really like that the voices are realistic and they actually work. I like the simplification of this app just take a picture and it scans it.

However, I don’t like that every uploaded photo the audio states “page 1” “page 2” etc. for starters…. those are not the actual page numbers in our book because we have to constantly be scanning new pages within new chapters of the book. It’s distracting from the text and the flow of the audio. Also, even if got scan a photo of the page perfectly somehow the Audio states a word that is sooo contrary to what the actual word is. A lot of mistakes on the audio reading simple words. Additionally, I don’t like the limit of 24 pages of scanning. That doesn’t cover the entire chapter of a book.

Also, I don’t like how I cannot name the bundle of pages I’ve already scanned.

By far, The worse thing is the fact there is no background audio play back. Meaning if my phone gets on “locked screen” the audio will immediately stop. The developer thought adding ONE PAGE audio playback option was enough? It takes less than 5 mins to read a page… you want me to select the button to play back the next page every single time through out the book? That is ridiculous. Amongst other issues. I look forward to seeing this app updated to improve on these features and then to become the #1 app of its kind but right now- these are my issues with it.
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Response from developer

Thank you for such a detailed list. In 1.0.5, out now, the "Page 1", "Page 2" headings in scans are no longer read aloud, and a camera scan takes up to 200 pages. Renaming a scan isn't possible yet; I've noted it. For a locked phone: speech is generated live on the phone, so open the ... menu and choose "Prepare chapter for lock screen" first, then lock it. If you send me a few misread words at support@sandbook.app, I'll look at each one.

..

Very good app

Response from developer

Thank you! Glad you're enjoying it. If you ever need to read a Word document, version 1.0.5 can import .docx files too.

Get it!

It’s quite amazing!

Response from developer

Thank you so much! If you want to keep listening with the phone locked, open the ... menu in a book and choose "Prepare chapter for lock screen".

Great voice, struggles with prosody

The voice itself is great. It sounds very human. But it struggles with pronouncing certain things and where to pause in sentences and phrases. The PDF I fed it had the word clothing split between two lines with a between CLOTH on first line and ING on second line. It pronounced it as two words instead of one. Another example is the words great apes. It pronounced it “gray-it ai-ips.” The word laid was pronounced “lay-id.” It also pauses at the end of every line for as long as at the end of every song entrance, making the reading choppy. The funniest was when humans was split between lines as hu-mans and it pronounced it “who” pause “mans.”

Would love using the voice, if the reading flowed and pronunciation improved!
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Response from developer

Thank you for the precise examples, they help a lot. Version 1.0.5, out now, joins words split by a hyphen at the end of a PDF line, so "cloth-ing" and "hu-mans" are read as one word, and line breaks inside a sentence no longer get a long pause. The vowel in words like "great" and "laid" is a known weakness of the pronunciation step I use, and I'm still working on it. If you send me other words it gets wrong at support@sandbook.app, I'll add them to my test list.

Feedback

Phenomenal, wish there was a built in dictionary too.

Response from developer

Thank you, I'm really glad you like it. A built-in dictionary isn't in the app right now, and I can't promise it soon, but I've noted the idea.

Developer apps

FAQ

Why doesn't Sandbook support background/screen-off reading?

Sandbook utilizes a large on-device model that requires significant GPU/VRAM. Apple's policies prohibit apps using high GPU/VRAM from running in the background.

Is it normal for my phone to heat up or crash when using Sandbook?

Heating up is normal due to the app's GPU utilization. Crashing may occur on devices with low memory (3GB or less), such as older iPhone models.

What languages does Sandbook support?

Sandbook currently supports English (US/UK) voices, offering both male and female options with natural pronunciation and intonation.

How does Sandbook protect my privacy?

All your data remains on your device and is never sent to the cloud or shared externally, ensuring complete privacy protection.

What file formats can Sandbook read?

Sandbook can read ePub, PDF, and TXT files, allowing you to listen to your documents with natural-sounding voices.

Can I export audio from Sandbook?

Yes, you can generate short speech samples and export them for further use, making it convenient for creating audio content.

What is the update frequency for Sandbook?

The app was last updated on 2025-12-27, indicating active development and support.

What devices is Sandbook compatible with?

Sandbook is available for iPhone and iPad, running on iOS.