Folio: Markdown+RST+Code+PDF

Folio: Markdown+RST+Code+PDF

Document Reader for Developers

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Details

  • Released
  • Updated
  • October 1, 2026
  • October 7, 2026

Features

Folio: Markdown+RST+Code+PDF screenshot #1 for iPhone
Folio: Markdown+RST+Code+PDF screenshot #2 for iPhone
Folio: Markdown+RST+Code+PDF screenshot #3 for iPhone
Folio: Markdown+RST+Code+PDF screenshot #4 for iPhone
Folio: Markdown+RST+Code+PDF screenshot #5 for iPhone
Folio: Markdown+RST+Code+PDF screenshot #6 for iPhone
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About

Folio is a small, native reader for the files a working life accumulates: Markdown notes and READMEs, reStructuredText and Sphinx documentation, source code, configuration and data files, PDFs, and images. It gives them one calm library, clear typography, and room to focus, on iPhone, iPad, and Mac. READ MARKDOWN THE WAY IT WAS MEANT TO LOOK Headings, lists, tables, task lists, blockquotes, code blocks, links, and images render on a page designed for reading, in light or dark, with serif or sans-serif type, and with text size, line spacing, and page width under your control. Equations in TeX notation render offline. An outline jumps between headings, Find highlights every match, Show Source reveals the document's own text, and Share offers the source file or a PDF of the page. The HTML that READMEs use for badges, centered logos, and collapsible sections renders too. reStructuredText files render the same way, with the Sphinx signatures, version notes, and cross-references of Python's own documentation. EVERY TEXT FILE, EXACTLY AS WRITTEN JSON, YAML, TOML, XML, HTML, CSS, shell scripts, Makefiles, logs, diffs, and source code in any common language open verbatim, with tabs, indentation, and long lines preserved. Code is colored by language, with three schemes and six editable colors, or no coloring at all if you prefer. PDFS AND IMAGES, WITHOUT LEAVING THE APP PDFs open with their own outline and Find. JPEG, PNG, HEIC, GIF, TIFF, WebP, BMP, and AVIF images fit the screen and zoom smoothly. Both are viewed from your files where they are; only one opened from a link is downloaded and kept. FILES, FOLDERS, AND LINKS Open a document, browse a whole folder, drop a file into the window, or paste a link. GitHub file links and direct HTTPS links to text, PDFs, and images are saved for offline reading, and text is refreshed while you read. Private repositories work with a personal access token that stays in your device's Keychain. YOURS, AND ONLY YOURS There is no account, no analytics, no advertising, and no upload service. Documents, bookmarks, and settings stay on your device. A single switch stops documents from loading images from the web. FREE TO BEGIN, SIMPLE TO UNLOCK Read complete text documents up to 10 KB for free, and view PDFs and images without limit. Folio Plus unlocks larger documents, Export PDF, and, on Mac, Print: • Folio Plus Lifetime: a one-time purchase of $19.99 (USD) • Folio Plus Yearly: an auto-renewing subscription of $9.99 (USD) per year Both support Family Sharing. Subscriptions are charged to your Apple Account at confirmation and renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel them in your Apple Account settings. Privacy Policy: https://bluetaollc.github.io/FolioApp/privacy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Requires iOS 17, iPadOS 17, or macOS 14 or later.
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What's New in Folio

1.1

October 7, 2026

Bug fixes. Support for Mermaid diagrams.

2

Subscriptions & In-App Purchases

Folio Plus

Unlock large documents, export, and print

$9.991 Year
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