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Sandbook: Natural Voice Reader icon
APP STORE

Sandbook: Natural Voice Reader

SmashMelon LLC · Productivity · United States store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card
Revenue a month, worldwide
Too small to estimate
Not enough chart or ratings data
New ratings
Tracking
Daily counts start building from today
Rating
4.6 of 5
109 ratings in this store
Countries it ranks in
0
was 0 on Oct 15, 2026

Revenue

Estimated from the grossing charts of Oct 21, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / MONTH · WORLDWIDE
Unranked
Not in any grossing chart, and it sells nothing in the store (no in-app purchases, free download). Any revenue comes from ads or payments outside the store, which we can't see.
EST. LIFETIME DOWNLOADS
3.8K to 10.9K
Estimated from ratings count
RATINGS
109
AVG RATING
4.57
PRICE
Free
AGE
1.4y
LAST UPDATE
5d ago
VERSION
1.0.8
SIZE
271 MB
AGE RATING
4+

Last 29 days

From our daily snapshots of every grossing chart.

DAYS IN A GROSSING CHART
0 / 29
COUNTRIES NOW
0 (was 0)
EST. REVENUE FROM CHARTS, DAILY · APP STORE ONLY EST
Show daily values
Sep 24, 2026not in a grossing chart
Sep 25, 2026not in a grossing chart
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Sep 30, 2026not in a grossing chart
Oct 1, 2026not in a grossing chart
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Oct 3, 2026not in a grossing chart
Oct 4, 2026not in a grossing chart
Oct 5, 2026not in a grossing chart
Oct 6, 2026not in a grossing chart
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Oct 15, 2026not in a grossing chart
Oct 16, 2026not in a grossing chart
Oct 17, 2026not in a grossing chart
Oct 18, 2026not in a grossing chart
Oct 19, 2026not in a grossing chart
Oct 20, 2026not in a grossing chart
Oct 21, 2026not in a grossing chart
Oct 22, 2026not in a grossing chart
Best rank Sep 24, 2026: not ranked. Now: not ranked. Days at zero are days outside every grossing chart.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
No in-app purchases
Earns from its upfront price, ads or payments outside the store.
REVIEW MOMENTUM
0.2 reviews / week
  • Recent reviews average4.0 stars
  • Recent 1 and 2 star share13%
From the latest 15 written reviews, covering 520 days.
RELEASE CADENCE
6 updates in 90 days
  • Typical gap between releases7 days
From the last 9 versions listed on the App Store.
RATING BREAKDOWN
109 ratings
5★80%
4★7%
3★7%
2★1%
1★5%

What users want

From the latest 15 reviews on the United States App Store, May 20, 2025 to Oct 7, 2026: 13% are 1 or 2 stars. Open a theme to read what people wrote.

WHAT THEY COMPLAIN ABOUT · SHARE OF BAD REVIEWS

Only 2 of the latest 15 reviews are 1 or 2 stars, too few to find patterns. Users are mostly happy.

WHAT THEY ASK FOR
  • Phenomenal, wish there was a built in dictionary too. 5★, Jun 5, 2026
  • It would be great if we could train/adopt new voices based on voice recordings (voice cloning). 3★, Apr 23, 2026
  • Would be great if it had a web app so it can also be used on desktop, but the ios app is great 5★, Jul 29, 2025
  • It would be awesome if this could be improved in future updates. 4★, Jun 5, 2025
WORDS THAT KEEP COMING UP IN BAD REVIEWS

Nothing stands out.

WHAT THEY LOVE · SHARE OF GOOD REVIEWS
Useful, it helps20%

2 of the 4 and 5 star reviews.

★★★★★ The ability to upload a document is incredibly useful.
★★★★★ Really love what Sandbook is doing — the text-to-speech feature is super useful and the overall design is clean and easy to use.

Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.

What users say

Latest reviews, United States App Store.

★★★★★Oct 7, 2026
See Edit Dev made fix - (Disappointed Constant Crashes)

Edit: 10/07/26 - Dev responded with a fix <3, and it has been working for me now. Excited to try it out now! I’ll soon update my review stars and give a proper review after I’ve had a chance to test its features. 10/04/26 - Just downloaded the app and it constantly crashes. When I try to listen to the different voice choices nothing happens, and then crashes. I was able to upload a PDF file, but as soon as I hit play the app crashes. I restarted my phone, reinstalled the app, and neither had any effect. On iPhone 12 Pro. Disappointed because I had high hopes for the app. Hopefully it will be in working order in the future.

★★★★★Oct 5, 2026
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.

★★★★★Sep 15, 2026
Get it!

It’s quite amazing!

★★★★★Jun 14, 2026
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!

★★★★★Jun 5, 2026
Feedback

Phenomenal, wish there was a built in dictionary too.

★★★★★Apr 23, 2026
Strange/Foreign Pronunciations 🙅‍♂️, but Human-Sounding 👍

The speech started off sounding so surprisingly *normal*/acceptable (which is above par for local iOS TTS). And then it reached the many words in the source text that include -eight (eight, weight) instantly revealed that all voice/region variants apparently come from one distinctively unusual/foreign source. It would be great if we could train/adopt new voices based on voice recordings (voice cloning). Continuing to avoid using this for now.

Store screenshots

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App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

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Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title.

read6sandbook5voices5book5text5time5spanish french5french italian5screen4chapter4natural voices3english spanish3portuguese hindi3italian portuguese3keep listening3sentence read3prepare chapter3spanish3french3italian3portuguese3hindi3voice3open3

What's new in 1.0.8

Bug fixes and more natural pronunciation for the Spanish, French, Italian, Portuguese and Hindi voices.

Released May 18, 2025. Current version shipped Oct 17, 2026.

Store description

Sandbook reads books, documents and articles aloud in natural voices, entirely on your iPhone or iPad. Nothing you read is uploaded, and there is no account, no subscription and no ads. NATURAL VOICES, OFFLINE - 41 voices in American and British English, Spanish, French, Italian, Brazilian Portuguese and Hindi - A book in Spanish, French, Italian, Portuguese or Hindi opens with a voice in its language - Powered by the open-source Kokoro model, running locally; no internet connection needed - Follow along as each spoken word is highlighted - Speed from 0.5x to 2.5x; each book remembers its voice and speed READ ALMOST ANYTHING - Import EPUB, PDF, Word (.docx), TXT, RTF, Markdown and HTML files - Add a web page by pasting a link, or share it from Safari - Scan printed pages with the camera, or pick a photo, and listen - Send files or selected text from any app with the share sheet, or type and paste your own - Open a document straight from the Files app with Open With, or set Sandbook as its default app LISTEN THE WAY YOU READ - Opens at the paragraph where you stopped - Keep listening when you leave the book, with a mini player at the bottom of the screen - Bookmarks, and search inside a book - Sleep timer: stop after a set time or at the end of the chapter - Passages you've already heard play back instantly - In a PDF, the sentence being read is highlighted on the page; tap any sentence to read from there - Reading options: light, sepia and dark themes, fonts, text size and line spacing - Appearance: light, dark or matching your system - See each book's length, listening time and the time left in the chapter - Prepare a chapter's audio ahead of time, then keep listening with the screen locked; prepared chapters replay instantly - Continue Reading with Siri or the Shortcuts app - Export any text as an M4A audio file ACCESSIBILITY - VoiceOver, Voice Control, Switch Control, larger text and contrast improvements - The app is available in English, Spanish, French, Italian, Portuguese (Brazil) and Hindi PRIVATE BY DESIGN Your books, text and voices stay on your device. Sandbook never sends what you read to a server. GOOD TO KNOW - Voices require iPhone 12 or later, or an iPad with an A14 or M1 chip or later. Sandbook also needs iOS 18.2 or later. - Real-time reading pauses when the screen locks. To listen with the screen off, prepare the chapter first. Questions or ideas: support@sandbook.app

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