Record and identify bird with detailed species information. Access over 240 bird species and 1600 high-quality audio samples. Play male songs, calls, alarm calls, juvenile , and aggression noises.
Practice with one-on-one sessions led by Ivy-League tutors. Receive feedback on essays, interviews, and presentations. Access daily lessons on current affairs and business topics.
Check flight levels with real-time maps and automated forecasts. Receive handcrafted email updates from experts. Set alerts for zones. Share forecasts with travel companions. Track flight-specific conditions.
Track visited and national parks with a customizable map. Add colors and markers to indicate progress. Share maps with friends and family. Set labels for unvisited locations. Organize travel history and exploration status.
Create daily drawings through guided challenges with specific prompts. Receive instant feedback on artwork. Track XP, maintain streaks, and compare rankings on leaderboards. Features a clean interface optimized for artists.
With interactive lessons covering conversations, vocabulary, and grammar. Watch videos of young Americans. Access printable worksheets, assessments, and lesson plans for self-study or classroom use.
Take listening, reading, writing, and speaking tests
Take a free covering listening, reading, writing, and speaking sections. Submit answers and receive immediate results. Practice with sample questions and review feedback for each part.
Read and search biblical texts with the Chinese Union Version. Automatically flip pages and play audio. Set sleep timers and continue playback in the background. Access content offline with light and dark themes.
For the Mechanical Comprehension with 220+ practice questions and detailed explanations. Take four practice tests. Review incorrect answers and save favorite questions for later.
Is an AI bot that generates stories, songs, and answers questions. It tells jokes and performs various creative tasks. Users can interact with the AI for different types of content creation and information retrieval.
Create words from letter tiles in a fast-paced . Connect tiles to form words and earn higher scores with longer combinations. Use the dynamic help view to learn gameplay basics and improve word skills across levels.
Learn chess openings with a comprehensive book collection. Test memory of key moves. Practice lines against a bot. Complete missions by reading and practicing.
Learn Korean from beginner to advanced levels with structured grammar lessons and example sentences. Access over 5000 vocabulary words with audio and definitions. Customize flashcards for memorization and create personal vocabulary lists.
Convert numbers between , , hexadecimal, and octal formats. Input a value and select the target format for conversion. Display results clearly with error handling for invalid entries.