Comparison

Sandbook vs Milestone

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 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.

Highlights
  • On-device text-to-speech
  • Reads ePub, PDF, TXT files
  • Type or paste text
  • Read webpages aloud
  • Export audio files
  • Privacy protection
Features
Read full 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

About

Milestone

Features
Read full description

Progress is easy to forget. Milestone makes it easy to remember. Capture what you're working on with photos, voice notes, and text. Everything is organized on a timeline, so months of slow progress become something you can actually see. CAPTURE IN THE MOMENT Open the app and the camera is ready. Take a photo while the work is in front of you, record a voice note while the details are fresh, or type a note instead. Each entry keeps the moment, the context, and the date together. The whole flow takes seconds, so documenting progress never gets in the way of making it. SEE YOUR PROGRESS Everything lands on a chronological timeline, counting up from the day your project started. Scroll from your first entry to today to see where you started, what changed, and how it all came together. Progress that's hard to notice day to day becomes obvious when you can see it in order. Keep as many projects as you have going. Each one has its own timeline and day count. PLAN WHAT'S NEXT Keep tasks alongside each project so the work ahead stays connected to the progress you've already made. Reorder tasks, check them off when they're done, and add due dates only when you need them. Tasks can include photos, voice notes, and text too, so they're more than just a checklist. Completed tasks stay organized by when you finished them and can be cleared whenever you no longer need them. UNDERSTAND MORE WITH ON-DEVICE AI Milestone uses on-device AI to transcribe voice notes and analyze photos for readable text and visual subjects. Search for what you said, what was written, or what appeared in a photo—all without uploading your private moments to a Milestone server. FIND IT AGAIN Search your notes to find the moment you can't quite place. Voice-note transcripts and photo text or visual labels are included, so search can find what was said and what appeared in a photo, not just what you typed. Flag important entries so they're easy to return to later. KEEP EVERYTHING TOGETHER Project photos get buried in your camera roll. Details disappear into messages or stay in your head. Milestone keeps the photo, the context, and the moment together in one place. FOR ANYTHING WORTH DOCUMENTING Personal goals. Creative work. Home improvements. School projects. Travel. Restorations. Anything that takes long enough that you'll want to look back on it. YOUR DATA, YOUR DEVICES There is no Milestone account and no Milestone server. Your entries stay on your device and sync across iPhone and iPad through your own iCloud. Turn iCloud off and Milestone still works on one device.

Screenshots

Sandbook4 screens
Milestone4 screens

Verdict

The call

The clearest difference is update cadence: Sandbook at weekly against Milestone's every 3 weeks. On price, ads, in-app purchases and device support 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.

UpkeepUpdate frequency

Sandbook ships an update weekly, Milestone every 3 weeks. The most recent releases landed on October 21, 2026 and October 6, 2026 respectively.

Scorecard1 real difference · 9 level
Sandbook versus Milestone: the parameters behind the verdict, then further details
ParameterSandbookMilestone
PriceFreeFree
Rating4.6 (107 ratings) — better—
Positive reviews77.8% of reviews—
Number of ratings107 — better—
Update frequencyWeekly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS18.218.0 — better
Further details — not scored
Size271 MB5 MB
Age rating4+4+
DeveloperSmashMelon LLCEric Fan

In-app purchases

None

Sandbook

No in-app purchases

None

Milestone

No in-app purchases

Questions

Is Sandbook free?
Sandbook is free to download, with no in-app purchases.
Is Milestone free?
Milestone is free to download, with no in-app purchases.
Do Sandbook or Milestone have ads?
Neither Sandbook nor Milestone shows ads.
Which is updated more often, Sandbook or Milestone?
Sandbook ships an update weekly, and Milestone every 3 weeks. Most recently, Sandbook was updated on October 21, 2026 and Milestone on October 6, 2026.

Other comparisons