Comparison

Sandbook vs img2pdf

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sandbook

This app converts text from various file formats, web pages, and images into natural-sounding speech. It offers offline listening, customizable playback speed, and pronunciation adjustments, making it ideal for hands-free consumption of written content.

Highlights
  • Offline text-to-speech
  • Supports EPUB, PDF, Word, web pages, and images
  • Natural Kokoro voices run locally
  • Customizable playback speed and pronunciation
  • CarPlay and lock screen controls
  • Export text and audiobooks
  • Accessibility features for dyslexia
Features
Read full description

Free, offline text to speech for iPhone and iPad: Sandbook reads aloud your EPUB books, PDFs (scanned ones too), Word documents and web pages in natural Kokoro voices that run on your device. No subscription, no account, no ads, no listening limits, and no internet needed to listen. Nothing you read is uploaded. Press play, lock your screen and keep listening, or carry on in the car with CarPlay. LISTEN TO WHAT YOU READ - EPUB, PDF, Word (.docx), TXT, RTF, Markdown and HTML files, from the Files app or any app's share sheet - Scanned PDFs: pages with no text are recognized on your device and read aloud - Web pages: paste a link, or tap Save to Sandbook in Safari, Chrome and other apps, and they wait in Listen Later - Screenshots and images: share a screenshot, a photo or a post's image to Sandbook and it reads the text - Printed pages: scan them with the camera or pick a photo - Your own text: type or paste it - A shelf of public-domain classics in English, Spanish, French, Italian, Portuguese and Hindi, with a short sample before you download NATURAL VOICES, ON YOUR DEVICE - 41 voices in American and British English, Spanish, French, Italian, Brazilian Portuguese and Hindi, all included in the app - Plus beta voices in French, Spanish, Italian, Brazilian Portuguese, Hindi and British English - A book in Spanish, French, Italian, Portuguese or Hindi opens with a voice in its language - Powered by the open-source Kokoro-82M model, running locally - Each spoken word is highlighted, so you can follow along - Speed from 0.5x to 2.5x; each book remembers its voice and speed - Pronunciations: tell Sandbook how to say a name or word, in every book or just one, and import or export your list as a CSV or Markdown file MADE FOR LONG LISTENING - Opens at the paragraph where you stopped - Lock screen controls with the chapter's progress and 15-second skips - CarPlay: continue your book, or pick one from your library or Listen Later - Widgets for the Home Screen and Lock Screen, and a Play Sandbook control for Control Center and the Action button - Sleep timer: stop after a set time or at the end of the chapter - Continue Reading with Siri or the Shortcuts app READ CLOSELY, KEEP WHAT MATTERS - Select any text to look up a word or translate it - Bookmark passages and export them as a text or Markdown file - Search inside a book; in a PDF, the sentence being read is highlighted on the page, and you can tap any sentence to read from there - Turn a book into an audiobook: export a chapter or the whole book as one M4A file with chapter markers, or any text you type - Light, sepia and dark themes, fonts, text size and line spacing ACCESSIBILITY - For readers with dyslexia: follow each highlighted word as it is read, at the speed that suits you - 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 - Requires iOS 18.2 or later. Voices run on iPhone XS, iPhone XR and later, and on iPads with an A12 chip or later. - Also on the Mac (Apple silicon). Questions or ideas: support@sandbook.app

About

img2pdf

Easily convert photos and scans into compact PDFs directly on your device. Edit, reorder, and add text or signatures before exporting in various sizes. The app works offline and prioritizes user privacy with no account or tracking.

Highlights
  • Built-in document scanner
  • Import existing PDFs
  • Drag-and-drop page reordering
  • Add text pages and watermarks
  • Adjust image quality and compression
  • OCR for searchable text
  • Draw and flatten signatures
Features
Read full description

Photos to a clean, small PDF in seconds. Free: no ads, no watermark, no sign-up, no limits. Pick your photos in order, drag pages where you want them, see the file size, and share. That is the whole flow. When you need more, you can sign, password-protect, redact and search your PDFs too. PICK, ORDER, SHARE • Pick photos in the order you want the pages; the picker numbers each one as you tap • Scan pages with the document scanner, take a photo, or import PDFs from Files, including password-protected ones • Hold and drag to reorder, or select pages to rotate, move, duplicate, share or delete them • Reverse the order or sort by the date the photos were taken • Tap a page to see it full size, then swipe through the rest • Combine both sides of an ID card on one page, or split a two-page book spread SEE THE SIZE BEFORE YOU SHARE • Small, Standard and Best, each with a size estimate before you share • Colour stays on unless you turn it off; black and white makes the file smaller • Your country's page size (A4 or US Letter) with automatic orientation, plus Legal and original size • Compress any saved PDF again before you share it CLEAN UP EVERY PAGE • Crop with four-corner perspective correction and automatic edge detection • Rotate, and adjust brightness and contrast • Document, Enhance, Whiteboard and Crisp looks that lift shadows off paper • Erase marks, or black out private details: redactions are burned into the page and cannot be undone SIGN AND FILL • Draw a signature in black, blue or red and place it on any page • Add initials, text boxes and ticks to forms • Everything is flattened into the PDF on your iPhone FIND IT AGAIN • Searchable PDFs: text on your pages is recognised on-device and added as an invisible layer • Recents searches the text inside those PDFs, not just file names, and shows where the match is • Find a word inside an open PDF • Tag, pin, sort and merge PDFs in Recents • Copy, edit or share a page's text, turn a table into CSV, or save a business card as a contact PROTECT IT • Password-protect a PDF with 128-bit AES encryption when you export • Lock the app with Face ID or your passcode SHARE YOUR WAY • Share as PDF, or as JPG, PNG or HEIC images • Print directly with AirPrint • Name files automatically from the document's title and date, or use your own template • Start a scan from Siri, Shortcuts or a Home Screen quick action PRIVACY, PLAINLY • No account required • No tracking: the app's privacy manifest declares no tracking and no collected data • Scanning, text recognition, signing, redaction and compression all happen on your iPhone • Page images, recognised text and signatures stay on your iPhone. Exported PDFs stay on your iPhone in Recents; a copy goes to Files only when you choose Save to Files • No watermark unless you add one Free, with nothing to unlock.

Screenshots

Sandbook4 screens
img2pdf4 screens

Verdict

The call

The clearest difference is ratings volume: Sandbook at 208 against img2pdf's 1. Sandbook also leads on update cadence (every 5 days vs every 2 weeks). img2pdf's advantage is rating (5.0 vs 4.7). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

img2pdf holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Sandbook has 208 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Sandbook ships an update every 5 days, img2pdf every 2 weeks. The most recent releases landed on November 13, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Sandbook versus img2pdf: the parameters behind the verdict, then further details
ParameterSandbookimg2pdf
PriceFreeFree
Rating4.7 (208 ratings)5.0 (1 ratings) — better
Positive reviews85.4% of reviews—
Number of ratings208 — better1
Update frequencyEvery 5 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS18.218.0 — better
Further details — not scored
Size144 MB5 MB
Age rating4+4+
DeveloperSmashMelon LLCQuan Dang

Customer experience

Sandbook

All ratings202 ratings
Positive90.6%
Neutral5.0%
Negative4.5%
Written reviews41 reviews
Positive85.4%
Neutral9.8%
Negative4.9%

img2pdf

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Sandbook

No in-app purchases

None

img2pdf

No in-app purchases

Questions

Is Sandbook free?
Sandbook is free to download, with no in-app purchases.
Is img2pdf free?
img2pdf is free to download, with no in-app purchases.
Which has better reviews, Sandbook or img2pdf?
img2pdf is rated higher. Sandbook averages 4.7 out of 5 from 208 ratings, while img2pdf averages 5.0 from 1 ratings.
Do Sandbook or img2pdf have ads?
Neither Sandbook nor img2pdf shows ads.
Which is updated more often, Sandbook or img2pdf?
Sandbook ships an update every 5 days, and img2pdf every 2 weeks. Most recently, Sandbook was updated on November 13, 2026 and img2pdf on October 31, 2026.

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