RC Line for iOS

May 30, 2026 ยท View on GitHub

Overview

RC Line is an iOS reading assistant designed for individuals with reading difficulties, such as dyslexia or visual tracking challenges.

By combining on-device OCR with intelligent line-by-line highlighting and a fully customizable interface, RC Line transforms scanned physical documents and digital text into an accessible, distraction-free reading experience. It eliminates visual overload and helps users maintain focus without losing their place.

  • On-Device OCR: Instantly extracts text from images or the live camera.
  • Guided Reading: Highlights one text segment at a time to enhance visual tracking.
  • Tailored Experience: Offers full customization of fonts, line/letter spacing, and contrast modes.
  • Assistive Interactions: Supports eyes-free and hands-free controls tailored for accessibility.

Key Features

Privacy-First Text Input (OCR)

  • Leverages Apple's Vision Framework for fast, real-time text recognition.
  • Processes everything entirely on-device, ensuring user privacy.

Screenshots of CameraView

Line-by-Line Highlighting & Gestures

  • Segments text into readable chunks to reduce visual fatigue.
  • Uses intuitive screen-splitting tap gestures to move between lines seamlessly, avoiding the need to hunt for small buttons.

Screenshot of ReaderView

Advanced Accessibility Customization

  • Supports a variety of typography options, including dyslexia-friendly fonts.
  • Real-time preview adjustments for font size, line spacing, and high-contrast background themes to suit individual visual preferences.

Screenshots of ReaderView

Advanced Features

  • Blink Detection: Uses the front-facing TrueDepth camera to let users control line navigation using only eye blinks.
  • Haptic Guidance: Provides distinct haptic patterns for navigation feedback, reducing reliance on visual cues alone.
  • AI-Powered Simplification: Integrates on-device intelligence to explain complex phrasing instantly.

Screenshots of Advanced Features

Tech Stack

  • UI/UX: SwiftUI, UIKit, CoreText
  • Vision & AI: Vision Framework (OCR), ARKit / AVFoundation (Eye-tracking), CoreML
  • System Integration: CoreHaptics, AVFAudio (Text-to-Speech)