ChessAtlas vs Purrminal

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

ChessAtlas compared with Purrminal
Detail	ChessAtlas	Purrminal
What it does	Free chess opening trainer with spaced repetition	Desktop pets on your Windows taskbar that your work feeds, cares for and unlocks
Stage	Not given	Startup
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
Pricing	Not given	Free: all 16 pets earned by playing, focus timer, daily quests, pet care, Friends groups, Claude Code/OpenCode/Pi pets. Premium: $3.99/month or $29.99/year (save 37% annually). Premium adds 50% more coins, one extra daily quest, reply to coding agent from pet, custom photo pet, and start Friends gro
Key features	Spaced repetition with FSRS algorithm Repertoire builder Opening trainer with instant feedback Game import from Lichess and Chess.com Deviation detection Course library with opening courses iOS and Android mobile apps Multiple language support	16 collectible pets to unlock by earning coins Pomodoro-style focus timer with customizable rounds Pet care system: feeding, water, play, and baths Claude Code, OpenCode and Pi agent integration Daily quests and focus streaks Friends groups with weekly leaderboards Local save: no tracking or cloud uploads Premium subscription with 50% more coins
What makes it different	FSRS algorithm schedules reviews 15-30% more efficiently than SM2 Automatic deviation detection from Lichess and Chess.com games Full repertoire builder in free tier with no course purchase required	Work earns coins that feed and unlock pets while you focus Integrates with AI coding agents to show what they are doing All pets unlockable for free, no loot boxes or pay-to-win Data stays local on your PC with no tracking
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)	17 +1 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	22	0
Citation Flow (Majestic)	24	12
Referring domains (Majestic)	34	1

4 details filled in for both companies.

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