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Sandbook
Turn EPUBs, PDFs, web articles & scans into natural speech.
Sandbook turns EPUBs, PDFs, web articles, scanned pages, and photos into natural-sounding audio. Powered by Kokoro, speech is generated directly on your iPhone or iPad, with no cloud processing. Choose from 41 voices across 6 languages, follow along with word-by-word highlighting, and listen offline. Completely free. No account, no ads, no subscriptions, and no character limits.
Hey Product Hunt! 👋
I'm an indie developer, and I built Sandbook because I wanted a simple way to listen to books, articles, and documents without paying another subscription or sending my reading material to someone else's server.
The idea was simple: What if high-quality text-to-speech could run entirely on an iPhone, for free?
That's what Sandbook does. It uses Kokoro, an open-weight speech model that runs directly on your device.
You can listen to EPUBs, PDFs, web articles, and even scanned pages, with 41 voices across 6 languages. There's also word-by-word highlighting so you can follow along while listening.
Curious how the voices sound? You can try Kokoro right in your browser, no app installation needed:
https://sandbook.app/kokoro-tts-...
And it's completely free. No subscriptions, no accounts, no ads, and no character limits.
One limitation worth mentioning: real-time speech pauses when you lock your screen. For background listening, you can prepare a chapter's audio in advance.
I'd love to hear your feedback, especially on the voice quality and reading experience.
Thanks for checking it out! ❤️
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About Sandbook on Product Hunt
“Turn EPUBs, PDFs, web articles & scans into natural speech.”
Sandbook was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #87 on the daily leaderboard. Sandbook turns EPUBs, PDFs, web articles, scanned pages, and photos into natural-sounding audio. Powered by Kokoro, speech is generated directly on your iPhone or iPad, with no cloud processing. Choose from 41 voices across 6 languages, follow along with word-by-word highlighting, and listen offline. Completely free. No account, no ads, no subscriptions, and no character limits.
Sandbook was featured in Artificial Intelligence (481k followers), Books (122.8k followers) and Audio (2.2k followers) on Product Hunt. Together, these topics include over 146.3k products, making this a competitive space to launch in.
Who hunted Sandbook?
Sandbook was hunted by Ke Fang. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Sandbook stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Ke Fang