TypeTester app for iPhone and iPad

Type Tester is a font preview tool APP.
It is suitable for the following roles:
- iOS/UI designers need to quickly preview font effects
- Developers need to find suitable system fonts
- Content creators need to design text styles
- Learners want to understand the iOS font system

The application currently contains the following features:
1. Font browser
- System font family classification display
- Supports search and filtering
- Font information display

2. Preview editor
- Custom preview text
- Adjust font size, line spacing, etc.
- Supports multiple paragraph styles
- Real-time preview of effects
3. Style management
- Save frequently used styles
- Export code snippets
- Font comparison function