| What it does | Free unassisted coding skills diagnostic for developers
| AI study workspace that turns your course materials into guides, flashcards, quizzes, and podcasts
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Freemium
| Freemium
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| Pricing | Free: 14-minute diagnostic, one daily practice set with free account, daily puzzle, share cards. Monthly flex: $4.99 first 30 days, then $10.99 per 30 days. Annual rebuild: $84 for 365 days (about $7 per month, save 33%). Paid in USDT, USDC or DAI on Ethereum; no auto-renewal.
| Free study preview available. StudySim Pro: $1 for first 3 days, then $20/month or $120/year (equivalent to $10/month).
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| Key features | - 14-minute AI-off diagnostic measuring six coding skills
- Per-skill profile with bands from Sharp to Offloaded
- Trace replay showing variable changes line by line
- Adaptive daily practice with spaced repetition
- Mastery ladder tracking skill levels Cold to Sharp
- XP and practice day gamification layer
- Full drill library browsable by skill, difficulty and language
- Interview pre-flight seven-day plan
- Skill decay trend over time with dated retakes
- Per-language tracking for JavaScript, TypeScript and Python
| - AI study guide generation from uploaded sources
- AI flashcard generation from uploaded sources (Notecards)
- AI practice quiz generation from uploaded sources
- Two-speaker podcast generation from uploaded sources
- Study spaces organized by class, unit, or exam
- Support for PDF, DOCX, TXT, Markdown, and PPTX files
- Support for MP3, WAV, OGG, MP4, and WebM audio and video
- YouTube link support for study material
- Customizable quiz settings including length, question types, difficulty, and timing
- Customizable podcast host voices, length, and instructions
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| What makes it different | - Measures unassisted coding without AI, autocomplete or editor tools
- Diagnostic kept separate from practice to avoid training contamination
- Six-skill model focuses on code reading and review, not algorithms
- Prepaid crypto payments with no auto-renewal
- Per-language metrics tracked separately without averaging
| - Single set of sources generates multiple study formats without rebuilding material
- Organized study spaces keep all materials and tools for one class or exam together
- Free personalized study preview without payment or credit card required
- Two-speaker podcast format for audio review while commuting or taking breaks
- Support for combining multiple source types in one study space
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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
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 1 ▲ +1 (up) since last check | 9 ▼ −1 (down) since last check |
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| Trust Flow (Majestic) | 0 | 4 |
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| Citation Flow (Majestic) | 16 | 27 |
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| Referring domains (Majestic) | 3 | 71 |
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