iPhone Apps to Optimal performance

MuPDF is a lightweight, portable document rendering engine and viewer for PDF, XPS, and EPUB formats. Known for its speed and accurate rendering, it's ideal for integrating document display into various applications or for users seeking a minimalist, high-performance viewer.

Autodesk SketchBook is a powerful yet intuitive digital drawing and painting application designed for artists, designers, and creative professionals. It offers a comprehensive suite of tools to create stunning artwork on various platforms, focusing on a natural drawing experience.

Foxit Reader is a robust and feature-rich PDF reader and editor that provides users with a comprehensive set of tools for viewing, annotating, signing, and creating PDF documents. Known for its blend of performance and functionality, it caters to both casual users and professionals handling complex PDF workflows.

GoodReader is a powerful document reader and file manager for iOS, excelling in handling large PDF files, annotations, and secure cloud integration, ideal for professionals and students needing robust document management on the go.