ReactionAtlas vs Charged Physics Lab

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.

Charged Physics Lab turns the Physics I and Physics II formula sheet into an interactive problem-solving workspace. Start with the language in a homework problem, a quantity you need, or a formula you recognize. Search across 200 equations or browse the Formula Map by physics section. Open a formula to see its variables, fixed units, physical meaning, and a diagram that responds to the values in the equation. The equation itself is the calculator. Tap a variable tile to enter a value. Hold a tile to isolate that variable automatically, or use a short hold and swipe to make one inverse algebra move yourself. When every required value is known, the result appears immediately. For multi-step problems, carry a solved quantity into a related formula and keep the calculation on the same working blackboard. Formula search surfaces useful next equations when a result can feed another step. Teacher-style worked examples combine the physical story, a labeled visual, symbolic rearrangement, substitution, units, and interpretation. Narration and the visual presentation move together so you can follow the reasoning instead of only seeing a final answer. Included: • 200 Physics I and Physics II equations • Plain-English, symbol, quantity, and topic search • Interactive variable tiles with fixed units • Automatic isolation and step-by-step algebra gestures • Live diagrams and variable explanations • Narrated worked examples • Multi-formula problem chains • A built-in How to Use guide • On-device progress and settings • Core learning content available without an internet connection Charged Physics Lab is a learning and calculation aid. Always use the assumptions and sign conventions appropriate to your course and problem.