Flagtastic vs (Open Source) Periodic Table

Master Flags & Anthems of the World with Flagtastic! Test your geography and music knowledge in this engaging quiz app that makes learning world flags and national anthems fun and competitive. Whether you're a geography enthusiast, student, or just love a good challenge, Flagtastic offers an educational experience that's both entertaining and rewarding. KEY FEATURES: Two Quiz Modes • Flag Recognition - Identify countries by their flags • Anthem Quiz - Listen and identify national anthems from 155+ countries Dynamic & Engaging • Fresh questions every time from our comprehensive database • Game Center integration - compete globally and challenge friends • Continent-based learning or worldwide challenges Fully Customizable • Adjust quiz length, difficulty, and themes • Auto-play controls for anthem mode • Track separate stats for flags and anthems Educational & Fun • Review mistakes with detailed explanations • Fun facts about flags and anthem history • Achievement system to track your mastery Multilingual Support • Available in 8 languages: English, Norwegian, Swedish, Sami, German, French, Spanish, Danish PERFECT FOR: Geography students and educators Music and culture enthusiasts Travel lovers preparing for adventures Quiz fans seeking unique challenges Anyone wanting to expand their world knowledge WHY FLAGTASTIC? Unlike static flashcard apps, Flagtastic creates a dynamic, game-like experience that keeps you engaged while genuinely improving your knowledge. The anthem quiz adds a musical dimension to geography learning, making it more memorable and fun. Compete globally or learn at your own pace! Download Flagtastic today and start your journey to becoming a flag and anthem master! Note: Game Center account recommended for full competitive features and progress tracking.

A clean, free periodic table for chemistry students, teachers, and curious people. Explore all 118 elements in an interactive table, then tap into detailed element cards with atomic, physical, discovery, and isotope data. Switch color modes to see trends across the table, search by name or symbol, compare properties, and use practical tools when homework or curiosity sends you down a chemistry rabbit hole. FEATURES Interactive Periodic Table Pinch, pan, zoom, and tap through the full periodic table with category colors and property heatmaps. Element Quiz Learn symbols, names, atomic numbers, and element families with quick 10-question rounds. Start with the first 20 elements and work up to all 118. Element Details See atomic mass, density, melting point, boiling point, electronegativity, radius, electron shells, discovery facts, isotopes, and more. Safety Data GHS hazard pictograms, signal words, and hazard statements for 77 elements, free. No PRO lock. Search and Lists Find elements quickly by name, symbol, or atomic number. Isotopes Browser Browse thousands of nuclides with half-life, decay, abundance, and nuclear data. Molar Mass Calculator Parse formulas with nested groups and hydrates, then see the element-by-element mass breakdown. Chemistry Tools Balance equations, review common reactions, inspect trends, and use reference tables for ions, solubility, constants, and organic series. Mini Academy and Dictionary Learn core chemistry ideas with compact lessons, glossary entries, and quick checks. No ads. No paywalls. No account required. 100% Open Source The complete source code is public - see it, audit it, or contribute at https://github.com/Open-Apps-Studio/periodic-table