037 is the studio name of Jaewon Seo, an independent developer in South Korea who makes iOS apps alone, among them the planner Sync and the puzzle Chesspy. Their Zenn profile says the apps are developed with Claude Code. 037 is the App Store seller of Chesspy, and the studio site 037.works lists the developer's apps.
Also reported as: Jaewon Seo, 서재원, jaewonseo
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A daily logic puzzle: place rooks, bishops and knights so every numbered square is attacked by exactly that many pieces. The solo developer says the code was almost all written by Claude Code.
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