One of the challenges with note taking apps on mobile is the limited font selection. While desktops let you install custom fonts system-wide, mobile platforms are much more restrictive.
However, there’s an elegant solution for Obsidian given it’s an electron app. Obsidian allows you to inject a CSS snippet to tweak the appearnace of the app. CSS allows you to embed base64 encoded fonts directly in them for styling text 💡.