# AppForges (杭州柒衡科技)

> AppForges builds practical, reliable, privacy-conscious software for learning, knowledge, and creation. Based in Hangzhou, China.

## Products

- [ThinkFlow (思泉)](https://appforges.com/en/products/thinkflow): A macOS video learning app that transcribes media locally and uses cloud AI to turn transcript text into a time-linked mind map. Available on the Mac App Store.
- [Qianji (千机阁)](https://appforges.com/en/products/qianji): An offline system-architecture app covering 8 domains, 58 topics, and 278 lectures, with full text through Lecture 227, dual navigation, search, annotations, and sharing as posters, article long images, or prepared text. Available on the App Store for iPhone and iPad, with a direct Android installer from the official website.
- [Hanzi (字迹)](https://hanzi.appforges.com): Online Chinese character learning platform with interactive stroke order animations, idiom dictionary (31,648 idioms), word lookup (264,434 words), multi-dimensional character indexing (pinyin, radical, stroke count), and multilingual support (Chinese, English, Japanese).

## Free Online Tools

- [Mermaid Diagram Editor](https://appforges.com/tools/diagram/mermaid): Create flowcharts, sequence diagrams, class diagrams, state diagrams, ER diagrams, Gantt charts, pie charts, and mind maps using Mermaid syntax. Export as high-resolution PNG.
- [PlantUML Diagram Editor](https://appforges.com/tools/diagram/plantuml): Create UML diagrams including use case, activity, component, and class diagrams using PlantUML syntax.
- [ID Watermark Tool](https://appforges.com/tools/watermark): Add protective watermarks to ID document photos to prevent misuse. All processing happens locally on the user's device — images are never uploaded to any server.

## Company

- [About Us](https://appforges.com/about): Our mission is to bring families closer and make creation simpler through innovative technology. Our vision is to become the world's leading provider of family interaction and creative tools.
- [Contact](https://appforges.com/contact): Email contact@appforges.com, support@appforges.com
- [Support](https://appforges.com/support): Technical support and help center
- [Changelog](https://appforges.com/changelog): Product updates and version history
- [Developer Resources](https://appforges.com/developers): API documentation, SDKs and development tools

## Legal

- [Privacy Policy](https://appforges.com/privacy)
- [Terms of Service](https://appforges.com/terms)