Look up words with definitions, pronunciations, and example sentences. Access grammar rules, thesaurus entries, and collocations. Explore 165,000 corpus-based examples and 230,000 vocabulary entries. Save notes and bookmark words for later review.
English learning dictionary with extensive features.
The app offers over 230,000 words, phrases, and meanings, with 165,000 examples from natural English. It includes integrated thesaurus and collocations, plus graphics and videos for definitions.
Diagnose eye conditions and access treatment guides
Provides diagnostic tools for eye conditions. Users can calculate visual acuity, transposition, and glaucoma risk. Features include dry eye disease assessment and diabetic retinopathy severity evaluation. Age to bifocal calculation is also available.
Look up words with definitions and examples. Bookmark and review words for later. Access an English dictionary for cross-referencing. Use training modules to practice vocabulary. Sync study progress across devices.
Use AR to draw on real surfaces by outlines. Share drawings with others. Learn techniques through interactive lessons. Practice new skills in a realistic environment. Export artwork in various formats.
Play puzzles by swiping letters to form words. Solve daily challenges and unlock new locations. Track progress and compete with friends. Customize difficulty levels and themes. Share achievements and hints.
Identify rocks, stones, gems, and crystals by taking a photo or selecting from the gallery. Get instant results with detailed information about each item. Suitable for both professionals and amateurs.
Look up words in German or English with instant translation. Access a comprehensive database of over 100,000 entries. Hear pronunciations in both languages. Search for words or expressions. View translations simultaneously during searches.
Practice flying RC helicopters and drones with realistic flight simulations. Adjust controls to mimic real models. Learn to navigate through virtual fields. Crash test models without real-world consequences.
Access detailed dictionary content with rich examples and pronunciation tools.
The app provides access to a comprehensive dictionary with extensive examples and pronunciation features. It includes offline functionality and supports multiple devices.
With interactive tutorials and project-based lessons. Complete exercises to practice coding concepts. Access code examples and debug tools. Track progress and review lessons for reinforcement.
Practice math facts with interactive challenges focused on addition and multiplication. Select numbers to reach target sums or products. Earn points for correct answers and avoid distractions. Track progress and support strategic thinking.
Identify and coins with detailed information on type, year, mint, and condition. Search by type or country. View historical prices and market trends. Track collections and compare values across different currencies.
Test vocabulary by identifying known English words and receiving personalized recommendations. Create custom word lists. Learn words through AI-generated exercises, language games, and visual aids like GIFs, active recalling, and spaced repetition.