MDViewer vs Telescopo
Two native macOS Markdown viewers with different strengths, compared
Overview
Telescopo and MDViewer are both native macOS apps for viewing Markdown files. Telescopo positions itself as a premium multi-format document viewer with AI features. MDViewer is a focused Markdown viewer with Git integration and inline editing — currently free for early adopters (a Pro tier is planned).
They share the same core purpose — rendering .md files beautifully on Mac — but differ significantly in scope, price, and philosophy.
Quick Comparison
| MDViewer | Telescopo Free | Telescopo Pro ($29.99) | |
|---|---|---|---|
| Price | Free (early access; Pro tier planned) | Free | $29.99 one-time |
| Framework | SwiftUI | SwiftUI | SwiftUI |
| Markdown rendering | Full GFM | Full GFM | Full GFM |
| Mermaid diagrams | Yes — interactive SVG | Yes | Yes |
| KaTeX math | Yes | ? | Yes |
| Inline editing | Yes | No | No |
| Git history & diff | Yes | No | No |
| QuickLook extension | .md, .json, .mermaid | No | No |
| Table of contents | Smart TOC with scroll tracking | Navigator with scroll-spy | Navigator with scroll-spy |
| Tabs | Yes | ? | Yes |
| Themes | System light/dark | Light + Dark | 30 handcrafted themes |
| AI assistant | No | No | Yes (on-device, Apple Silicon) |
| EPUB support | No | No | Yes |
| PDF viewing | No | No | Yes |
| Code file viewing | No | No | Yes (70+ languages) |
| Export to PDF | Yes | ? | Yes |
| Default .md handler | Yes | Yes | Yes |
| Minimum macOS | 13.0 | Recent macOS | Recent macOS |
Where Telescopo Wins
Multi-format viewing (Pro). Telescopo Pro supports 70+ file formats — PDF, EPUB, SVG, CSV, JSON, XML, YAML, and major programming languages with syntax highlighting. If you want one app to preview many document types, Telescopo is more versatile. MDViewer focuses exclusively on Markdown.
AI assistant (Pro, Apple Silicon). Telescopo Pro includes an on-device AI assistant that reads your document and answers questions about it — summarize, extract key points, ask anything. It runs entirely locally using Apple Intelligence. MDViewer doesn’t have AI features.
Visual themes. Telescopo Pro offers 30 handcrafted themes with GPU-accelerated animated backgrounds. If aesthetics and reading experience matter to you, Telescopo offers more visual variety. MDViewer uses clean system light/dark mode.
EPUB and PDF reading. If you read e-books and PDFs alongside Markdown, Telescopo Pro handles all three in one app.
Where MDViewer Wins
Price (right now). MDViewer is currently free for early adopters — all features included, no paywalled tiers yet. A Pro plan is expected in the future, but early users get the full app at no cost. Telescopo’s free tier is limited; the full experience costs $29.99.
Inline editing. MDViewer lets you double-click to edit, Cmd+S to save. Telescopo is a viewer only — you need a separate editor to make changes.
Git history and diffs. MDViewer shows the Git commit history of any .md file with color-coded diffs. For developers reviewing how documentation changed over time, this is a unique feature. Telescopo doesn’t offer Git integration.
QuickLook extension. MDViewer includes a QuickLook extension for .md, .json, and .mermaid files. Press Space in Finder to preview any Markdown file without launching an app. Telescopo doesn’t have a QuickLook extension.
Focused experience. MDViewer does one thing — Markdown — and does it well. No format bloat, no AI upsells, no feature tiers. Open a .md file, read it, edit it, check its history.
Who Should Choose Telescopo
- Users who want one app for many document formats (MD, PDF, EPUB, code)
- People who value visual themes and customized reading experiences
- Apple Silicon users who want on-device AI document analysis
- Readers who work with EPUB books alongside Markdown
Who Should Choose MDViewer
- Developers who need Git history and diffs for .md files
- Anyone who wants to edit Markdown in the same app they read it
- Users who want QuickLook preview for .md files in Finder
- People who want a full-featured Markdown viewer at no cost (currently free for early adopters)
- Teams where “install this free app” is an easier sell than “buy this $29.99 app”
The Bottom Line
Telescopo is a multi-format document viewer that happens to be very good at Markdown. MDViewer is a Markdown-first tool built for developers who live in Git repos.
If you want one app to open everything — Markdown, PDFs, EPUBs, code — Telescopo Pro covers that. If you want a focused Markdown viewer with Git integration and editing, MDViewer is hard to beat — and it’s currently free for early adopters.
Try MDViewer
MDViewer is currently free for early adopters — all features included. Download it and see if it fits your workflow.
Requires macOS 13.0 or later. Intel and Apple Silicon.