# Hyday MD — Wiki-linked Markdown reader

> Wiki-linked Markdown reader (iPhone/iPad app by TZU YING WU.)

- Source: https://appshunter.io/ios/app/hyday-md/id6764302688 (this page in markdown: same URL + `.md`)
- Developer: [TZU YING WU](https://appshunter.io/developer/1895723542)
- Category: Productivity, Utilities
- Price: $0.99
- Age rating: 4+
- Requires: iOS 14.0 · 29 MB
- Languages: American English
- Released: 2026-04-28
- Data updated: 2026-09-11
- User reviews in markdown: https://appshunter.io/ios/app/hyday-md/id6764302688/reviews.md

## What is Hyday MD?

Hyday MD is a Markdown tool built for reading.

Originally designed as the mobile reader for the Hyday note-taking app, it lets you comfortably read notes stored in iCloud Drive on your iPhone and iPad. It is also a general-purpose lightweight Markdown reader — any .md file written with other tools displays just fine.

DESIGN PRINCIPLES
• Hands off your syntax — your files stay untouched
• Content first — the UI stays quietly in the background
• Typography is the design — hierarchy through type and whitespace, not decoration

FEATURES
• Frontmatter parsing: title, type, tags, createdAt, and lastModified extracted and displayed automatically
• Wiki links: [[note name]] jumps straight to the linked note; the back button returns to the previous one
• Mermaid diagrams: flowcharts, sequence diagrams, and more rendered inline, with full-screen viewing
• Reading font size: four levels (S / M / L / XL), independent of the system setting
• Edit and write back: tap edit, make changes, save — lastModified updates in your local time zone
• LaTeX math: inline and block syntax both supported
• Code blocks: syntax highlighting, language labels, one-tap copy
• Tables: GFM alignment syntax supported
• Task lists: GFM checkboxes rendered in brand colors
• Local images: paths resolved relative to the .md file
• hyday-asset custom scheme: maps to the assets/ folder at the vault root
• Hyday life log marks: start, end, now, idea, important — five states told apart by color
• Subfolder browsing: only folders containing Markdown are shown, keeping lists clean
• Recent files: jump back to your last-read note straight from the home screen
• Recent folders: persisted with iOS security-scoped bookmarks — no re-picking after relaunch
• Bundled fonts: Fira Sans Condensed and Fira Code, fully rendered even offline

PRIVACY
• No user data collected
• No analytics, no tracking
• No network requests (unless your files reference web images)
• Recent files and folders lists live only on your device

GOOD FOR
• Writers, engineers, and researchers who keep Markdown notes
• Hyday note app users
• Anyone who reads technical docs, lecture notes, or study notes on their phone

NOT FOR
• Rich-text (WYSIWYG) editing
• Team collaboration or cloud version control
• Reading PDF, Word, or other formats


## Version history (last 5 releases)

### 1.3.1 — 2026-07-19

This update fixes two rendering issues:
• A --- divider in the middle of a note was mistaken for frontmatter, hiding the content below it and sometimes writing timestamps into the note body on save. Only --- at the very top of a file is now treated as frontmatter.
• Nested list items indented by a single space now render as sub-items instead of being flattened.

### 1.3.0 — 2026-07-01

This update
- Standard Markdown links (including the angle-bracket form) now jump straight to the note too — matching how wiki links already work, with unresolved links shown grayed out
- Added a search field to the folder browser that also searches filenames inside subfolders, so you can quickly find a deeply nested note

### 1.2.1 — 2026-06-11

This update
• Refreshed the app description and About page — now covering wiki links, Mermaid diagrams, and reading font sizes
• Minor housekeeping

### 1.2.0 — 2026-05-28

What's New
• New reading text size setting (Small / Medium / Large / Extra Large); app text no longer scales with the system font size
• Tap [[note name]] wiki links to jump between notes; the Back button walks your full trail back
• Frontmatter properties are now collapsed by default — tap to expand for a cleaner read
• Files opened individually are now saved to Recents and reopen reliably
• Shows a download hint when an iCloud note takes a while to load

### 1.1.0 — 2026-05-21

Added Mermaid diagram rendering support. You can now display flowcharts, sequence diagrams, and more directly in your Markdown notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-11.*