PenguinRadar vs Readlink

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

PenguinRadar compared with Readlink
Detail	PenguinRadar	Readlink
What it does	Instagram tracker and analyzer for public accounts	A social reading app for organizing your library, discovering books, and sharing ideas with curious readers
Stage	Not given	Not given
Founded	Not given	Not given
Based in	US	CH
Pricing model	Freemium	Freemium
Pricing	Free: 50 signup credits plus 10 daily credits for lookups. Free Track: one following list up to 1,000 accounts, 3 scans in 7 days. Lite: $99/year (≈$8.25/month) with 1,000 monthly credits. Starter: $199/year (≈$16.58/month) with 2,500 monthly credits. Pro: $499/year (≈$41.58/month) with 7,000 monthl	Free: Tracking your library and your reading, stats, Discover and the feed. Premium: Optional subscription available in the app with features including advanced reading stats, unlimited shelves, unlimited AI reading chats, AI assistants (20 actions a day free, unlimited on Premium), AI index scannin
Key features	Instagram Story Viewer Instagram Likes Viewer Instagram Follower Viewer Instagram Follower Tracker Instagram Unfollow Tracker AI Analyzer for tracked accounts Follower export to CSV Email alerts for detected changes REST API and CLI access ChatGPT plugin and MCP server	Page-by-page reading tracker Book barcode scanner Goodreads library import AI reading chats Social feed for book discussions Reader matching Half-star ratings Private notes and highlights In-app PDF reader
What makes it different	No Instagram password required; uses email or Google sign-in Tracks changes with exact dates, not just final counts Priced per scan, not per subscription week Works across web, mobile apps and AI assistants with one account	Built specifically for non-fiction readers with curated recommendations and discussion tuned to non-fiction AI features connect insights across your personal books and notes Reader matching against 300+ curated celebrity libraries Highlights and notes stay linked to chapters for long-term reference
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	1 no change since last check	12 +3 (up) since last check
Trust Flow (Majestic)	0	4
Citation Flow (Majestic)	13	14
Referring domains (Majestic)	2	14

6 details filled in for both companies.

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