Complete by dragging missing letters to correct positions. Solve puzzles that start simple but increase in difficulty. Track progress and compete against others in real-time leaderboards. Share achievements on social media platforms.
Study and test knowledge of the 20 standard acids through customizable quizzes. Topics include names, structural formulas, 1-letter and 3-letter codes, codons, and side chain classes. Quizzes are available for free. Remove ads with an in- purchase.
Solve daily Crossword puzzles with scrambled words and clues. Unscramble letters to form correct answers. Track progress and view puzzle history. Share solutions with friends. No subscription required.
Search for words by typing, supporting anagrams and various games like Scrabble and Words With Friends. Include blanks by typing spaces. Search with prefixes and suffixes. Provide definitions to enhance knowledge.
Letters to form and complete puzzles. Solve challenging levels with varying difficulty. Improve vocabulary and spelling skills. Explore natural landscapes and environments. Customize gameplay options and track progress.
Solve room puzzles to unlock doors and progress through levels. Search for hidden items and examine clues. Complete challenges to each room. Track progress through multiple levels.
Guess a word based on up to four images. Skip words and return later. Earn coins by guessing with fewer images. Play in six languages including English, French, Russian, German, Spanish, or Portuguese. Complete 15 levels with 300 puzzles.
Vocabulary with over 6,000 featuring images, phonetic transcriptions, and native speaker pronunciations. Explore 15 thematic topics and 140 subtopics. Earn flowers to unlock all content for free.
Answer questions by using picture clues to find missing words. Select from multiple languages including English, French, German, Russian, Italian, and Spanish. Learn facts and challenge your problem-solving skills.