ChessAtlas vs Modeldle
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 Modeldle
| Detail | 
ChessAtlas | 
Modeldle |
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| What it does | Free chess opening trainer with spaced repetition
| A free daily quiz about AI models with sourced answers
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| Stage | Not given
| Not given
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| Founded | Not given
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| Based in | Not given
| Not given
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| Pricing model | Freemium
| Free
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| Pricing | Not given
| Not given
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| 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
| - Daily 8-question quiz about AI models
- Weekly 10-question quiz every Friday at 10:00 UTC
- Source links for every answer
- Archive of past quizzes
- Streaks and badges tracking
- Click or tap only gameplay, no typing
- Trading card result grading system
- Share scores with green and red squares
- No account required to play
- Optional sign-in to track streaks across devices
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| 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
| - Independent and not affiliated with any AI lab
- Values frozen with as-of dates so archived quizzes match exactly what players saw
- Progressive difficulty ramping from easy to hard questions
- Free to play with no ads
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 10 ▲ +1 (up) since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 22 | 0 |
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| Citation Flow (Majestic) | 24 | 13 |
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| Referring domains (Majestic) | 34 | 3 |
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4 details filled in for both companies.
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