Unsolved mysteries and economic theories explored.
The app presents over 100 natural and historical unsolved mysteries that currently defy scientific explanation. It also includes content related to "The Road to Serfdom," discussing economic systems and individual freedom.
by 红 陈★ 5.02 ratingsReferenceFreeData updated 2026-10-16
Record and replay lessons from a teacher. Listen to Quranic recitations. Access daily notes and lesson materials. View continuous updates on teachings and related content.
Solve educational questions with instant results and explanations. Access a growing library of problems. Report errors via the explanation page for quick corrections. No registration required.
Learn about influential through interactive 3D animations. Explore historical experiments and scientific discoveries. Engage with dynamic visuals to understand physics concepts. Available in multiple languages for students aged 8 to 18.
Identify insects and spiders using image recognition. View detailed species information including scientific names, habitats, and behavior. Compare similar species and save identification history for future reference.
Search for study material by typing specific questions from assignments. Retrieve related resources and view detailed explanations. Save and organize found content for later review.
Access conference details, presentations, and exhibitor information. Take notes on slides and draw directly on them. Connect with other attendees and manage event-related content.
Pray the Rosary daily with a digital counter and audio guidance. Track daily mysteries, reflect on each one, and follow the prayer sequence to avoid distractions.
Access a personalized digital library with adaptive reading content for PreK-3 students. Track progress and adjust reading levels automatically. Support small group, whole class, and individual learning.
The app offers 100 basic English lessons, a smart dictionary, common phrases, and basic grammar. It also includes pronunciation guides with an American accent and video lessons for offline and online use.
The app provides access to MIT campus news, shuttle tracking, and a searchable map. It also includes an event calendar, directory search, library account management, and dining information.
Offers daily exercises, warm-ups, and training for soloists and groups. Learn techniques for posture, breathing, performance, and harmonizing. Includes lesson plans for individual and choir practice.
The app teaches 100 frequently used Russian words and phrases with audio recordings from a native speaker. It includes cultural insights, practical phrases, and sample sentences to aid learning.
The app presents Arctic wildlife in an interactive picture book for children. It features over 30 animals across three illustrated scenes with animations and natural sounds, plus narrated facts about animals and plants.
The app provides details on over 250 countries and territories, covering topics like natural resources, industries, and government. It includes an offline world atlas and a country comparison function for easy analysis.
The app offers six calculator types including graphing, handwriting, and scientific functions. It displays equations and results simultaneously, supporting equation solving and graph plotting.
Teaches daily routines through interactive games and activities. Children learn vocabulary related to morning, day, and bedtime activities. Includes sequencing games and role-playing elements to reinforce learning.
The app provides 100 exercises for practicing everyday sequences and 60 exercises for identifying emotions in social situations. It offers configurable options for adapting the app to individual children.
Teaches number recognition and writing up to 100. Guides counting forward and backward. Introduces addition and subtraction. Includes interactive games for practice. Offers progress tracking for parents.
The app provides a Persian dictionary with translations, pronunciation, and examples. It also includes supplementary dictionaries for German, French, Spanish, Italian, Swedish, and Arabic to Farsi.
Identify and tag healthy trees in local areas. Upload photos and location data for scientific research. Contribute to studies on tree resilience and forest health.