Knut Book Scanner

Name: Knut Book Scanner
Author: Jussi Rajaniemi

By: Jussi Rajaniemi

Scan Pages, Build Your Library

Features & Capabilities

Scan two book pages at once with your iPhone. Smart auto-capture detects when to shoot, instant PDF, zero data collection. Try 500 pages free — unlock all for $2.99.

Knut: Book Scanner & PDF turns your iPhone into a fast, privacy-first book scanner. Place your book on a scanning stand, and the app captures two pages at once, splits them automatically, and generates a ready-to-share PDF — all without touching the cloud.

BUILT FOR READERS WHO VALUE PRIVACY

Every image you capture, every PDF you create, and every setting you choose stays on your device. No accounts. No cloud uploads. No analytics. No ads. We do not collect a single byte of your data.

HOW IT WORKS

Place your book on a scanning stand and position your iPhone above it.
Tap capture — or enable smart auto-capture to scan hands-free. The app detects when a page is ready and captures automatically.
When you stop scanning, your pages are assembled into a PDF automatically. Share it anywhere with one tap.

KEY FEATURES

Two Pages Per Capture — Photograph an open book and the app splits the image into individual pages automatically. One shot, two pages, every time.
Smart Auto-Capture — Powered by Vision-based document detection. The app recognizes when a page is settled and captures automatically — no fixed timers. A live confidence overlay shows green when the page is ready, amber while settling, and hides during page turns — so you always know when the next capture will fire. A configurable capture pause lets you turn pages at your own speed, and a fallback timer ensures no page is missed.
Adjustable Crop with Mirror Symmetry — Set your crop rectangle once and fine-tune it to frame your pages. Mirror symmetry applies the same adjustment to both pages — one setting, two perfect crops.
Zoom & Torch Control — Adjust camera zoom to frame your scanning stand perfectly. Toggle the torch for consistent lighting in any environment.
Instant PDF Generation — Your scanned pages become a shareable PDF the moment you stop scanning. No extra steps, no conversion waiting.
PDF Library — Browse, rename, sort, and preview all your scanned books in one place. Multi-select to share or export multiple PDFs at once.
Three Quality Presets — Choose High (maximum detail), Normal (balanced), or Compact (smallest file size) depending on your needs.
66+ Languages — Use the app in your language. From Arabic to Vietnamese, Knut supports over 66 languages out of the box.
100% Offline — Works without an internet connection. Your library is always accessible, wherever you are.