What Is Obsidian?
Obsidian is a knowledge management and note-taking app built around the concept of linked thinking. Unlike traditional note apps, Obsidian stores all your notes as plain Markdown files on your device — meaning you own your data completely. The mobile app (available for Android and iOS) brings the full power of the desktop experience to your pocket.
Who Is Obsidian For?
Obsidian isn't for everyone. It has a steeper learning curve than apps like Google Keep or Apple Notes. It's best suited for:
- Students and researchers who need to connect ideas across many notes
- Writers and content creators building a personal knowledge base
- Developers and professionals who prefer plain-text workflows
- Anyone frustrated by vendor lock-in from cloud-based note apps
Key Features
Linked Notes and Graph View
The standout feature is bi-directional linking. Type [[note name]] to link any note to another. The Graph View visually maps these connections — incredibly useful for spotting patterns in your thinking and finding related notes.
Plugin Ecosystem
Obsidian has a vast community plugin library. From calendar views and task managers to Kanban boards and Dataview (a database-like query system), plugins transform Obsidian into nearly any productivity tool you need.
Plain Text Storage
All notes are saved as .md files in a folder on your device. This means your notes are readable by any text editor, easily backed up, and never trapped in a proprietary format.
Sync Options
Obsidian offers its own paid sync service (Obsidian Sync) for seamless cross-device syncing. Free alternatives include syncing via iCloud, Google Drive, or Dropbox — though these require a bit of manual setup on Android.
Mobile-Specific Experience
The mobile app is a faithful port of the desktop version. The toolbar adapts for touchscreens with quick-access formatting buttons, and swipe gestures navigate between panels. Performance is generally smooth on mid-range and flagship devices. However, very large vaults (thousands of notes with many plugins) can experience some lag on older hardware.
Pros and Cons
| Pros | Cons |
|---|---|
| Full local, offline access to all notes | Steeper learning curve than simpler apps |
| Massive plugin ecosystem | Free sync setup on Android can be fiddly |
| Plain Markdown files — you own your data | No real-time collaboration (unlike Notion) |
| Free for personal use | Mobile UI can feel dense on small screens |
| Active, helpful community | Some advanced plugins are desktop-only |
Pricing
Obsidian is free for personal use. A commercial licence is available for business users. Optional paid add-ons include Obsidian Sync and Obsidian Publish (for publishing notes as a website). These are entirely optional — the core app is fully functional without them.
Verdict
Obsidian is genuinely one of the most powerful note-taking apps available on mobile. If you value data ownership, deep customisation, and building a connected second brain, it's hard to beat. Just be prepared to invest some time in setting it up the way you like it. For users who want something quick and simple, a lighter app may serve you better.
Rating: 4.5 / 5 — Outstanding for power users and knowledge workers; overkill for casual note-takers.