StarMap 3D+ Plus vs ReactionAtlas

Use your iPhone's compass and gyroscope to find planets, constellations, satellites, and more with crisp, colorful, high-definition Retina graphics that use every pixel of your iPhone or iPad! Hold the universe in your pocket! StarMap 3D Plus is the portable star atlas for beginners or advanced astronomers. Use StarMap 3D Plus to find the planets, stars, constellations, star clusters, galaxies, and nebulae visible to you based on your location and time. StarMap 3D will even use the compass to automatically align the map! • Real-time positions of 150 artificial satellites, including the International Space Station (ISS), and the Hubble Space Telescope • iPad Support • Over 100,000 stars, with detailed information for each of them • 6,441 deep sky objects, with details such as distance from Earth, diameter, apparent size and orientation, and morphology • All 88 modern constellations, with lines based on the outlines from "The Stars: A New Way to See Them" by H.A. Rey • MacRobert and Classic constellation lines also available • Location-based-services (LBS) / Global Positioning System (GPS) support, or manually enter your longitude and latitude • Adjustable date and time of day • Also adjust time instantaneously and interactively with the Time Scroll feature • Compass support, if present • Planetarium Mode for seeing only objects visible to you, or browse the entire celestial sphere • 3D Mode for visualizing the universe in three dimensions

ReactionAtlas puts 250 classic named reactions of organic synthesis in your pocket — fully offline, no account, no ads. BROWSE BY MECHANISM FAMILY Reactions are organized the way mechanisms actually work: Polar, Organometallic, Pericyclic, Radical, Carbene, Concerted, Photochemical. Full-text search across names, net transformations, and reagents. Star your favorites. RICH REACTION NOTES Every reaction includes its net transformation, controlled-vocabulary tags for category, mechanism, key intermediates and reagents, a reaction scheme and curly-arrow mechanism figure (from Wikimedia Commons, credited in-app), a concise mechanism walkthrough, an overview, and real synthetic applications from total synthesis. THE ATLAS An interactive force-directed map of the whole field: reactions cluster by shared mechanism and identical net transformation. Pinch to zoom, tap any node to jump to its note. Each note also carries its own radial "ego network" — same mechanism, same transformation, shared intermediates, shared reagents — so you can walk the web of organic chemistry one hop at a time. FLASHCARDS Quiz yourself from the transformation and reagents, reveal the answer, and track what you have mastered. Progress stays on your device. OFFLINE AND PRIVATE Everything is bundled. The app never connects to the internet and collects no data whatsoever. FREE AND PRO Every reaction's scheme and curly-arrow mechanism is free, forever. A single one-time purchase (ReactionAtlas Pro) unlocks the overviews, synthetic applications, mechanism insights with extra figures, the interactive atlas, and the flashcard quiz. No subscription. Made for students preparing for exams, researchers at the bench, and anyone who loves the logic of organic synthesis.