Lemma is a Markdown note app for people who frequently write formulas and code.
■ Live Preview
Only the line where the cursor is located displays the original Markdown text, while the rest is rendered immediately. It supports headings, bold, italics, strikethrough, and highlighting, lists and checkboxes, quotes and callouts, tables, images, and footnotes.
■ Formulas
LaTeX inside $…$ and $$…$$ is displayed as a formula immediately upon typing.
· Snippets: Within formulas, typing // changes it to a fraction, @a to α, and x1 to x₁ immediately.
· Formula Keyboard: Tapping a formula allows you to edit it using the dedicated formula keyboard.
■ Linking and Finding Notes
Link notes using [[Note Name]] and view their structure via outlines and backlinks. You can search across all notes, and searching by two Korean characters is also supported.
■ Code Blocks
Language-specific syntax highlighting and a copy button.
■ Other
· Auto-save
· Light and dark themes
· No account required and no ads
· Notes are saved only on the device
Note: This version does not sync between devices, and notes are stored within the app and will be deleted if the app is uninstalled.
Markdown notes where formulas are immediately visible. Only the writing area is in original text, the rest is neat.