Through interactive challenges in Python, JavaScript, C++, HTML, CSS, and SQL. Write and run code instantly to solve puzzles. Track progress and complete real-world tasks to build practical skills.
Learn with word definitions, example sentences, and pronunciation. Explore related search suggestions and analyze sentences for context. Save favorite words and review search history.
Run and TypeScript code offline using a built-in compiler. Execute code in a WebView with a console for debugging. Edit, compile, and test scripts without internet or server connection. Transpile TypeScript to locally.
Documents to create high-quality PDFs with auto-border detection and perspective correction. Enhance images by removing shadows and sharpening text. Edit text and images, fill forms, add signatures, and share files in multiple formats.
Create 3D models by combining and adjusting properties of 3D primitives. Paint models with custom materials or choose from material presets. Use the Properties Editor, Material Previewer, and Parts List for detailed editing.
Create and edit musical scores with multi-staff and multi-voice editors. Add notes and chords using the Pencil tool. Transpose sections with vertical drag. Use On-Screen piano for quick composition. Select and adjust elements with the Select tool.
Write and test C/C++ code directly on iOS devices. Compile and run code snippets using supported compilers. View execution results and debug code in real-time. Learn concepts through hands-on practice.
Create books using templates, add text and images from device files. Design covers and pages. Publish as print or eBook. Share books via email or cloud storage.
View documents in PDF, Excel, Word, PowerPoint, text, ZIP, video, and image formats. Open files directly from your device. Supports multiple types without requiring separate apps. Navigate pages, zoom, and search text within documents.
Alpha code reference allows users to look up species using four-letter . Enter to view species details. Sync with eBird checklists. Manage field notes with quick species identification.
Edit , Plain TeX, and Markdown documents offline. Navigate projects with outline view. Typeset documents using built-in engine. Open root files to auto-scan and configure typesetting settings.
A multilingual Japanese dictionary offering offline access. Search for words in English, French, Russian, or German. Provides definitions in English, French, Russian, and German. Includes JMdict data for accurate Japanese language entries.