Chemical Elements Practice vs Vivarium

Learning the chemical elements is essential for understanding science. Whether for school, university, or personal interest, a structured system helps build reliable memory for symbols, names and relationships. This app provides a clear and sustainable learning experience designed to strengthen long-term knowledge more effectively than simple quizzes. At its core is an adaptive spaced repetition system that adjusts review intervals based on how well you remember each element. If you recall an item after a longer interval than expected, the next interval is extended. If you hesitate or forget, the interval decreases without resetting your progress. This ensures that your practice time focuses on what truly requires reinforcement. Two learning modes support different goals. Multiple Choice enables quick practice and helps establish recognition patterns. Self-Assessment encourages active recall: you attempt to retrieve the answer before rating whether you knew it, almost knew it, or did not know it. This process significantly improves long-term retention. The app includes all 118 chemical elements, organized into familiar groups: s-block (14), p-block (36), d-block (40) and f-block (28). You can freely select which categories to study and choose from several question directions, such as Symbol → Name, Name → Symbol, or prompts focused on groups or periods. You may adjust all settings at any time without losing progress. Category tests provide a clear overview of your knowledge. Each test presents all relevant elements once and awards a silver or gold medal depending on your score. This makes it easy to track progress over time. A full card browser is also available, allowing you to look up any element whenever needed.

Vivarium transforms Conway's Game of Life into a living microscope slide. Watch as cells evolve, merge, and form complex organisms — all rendered in real-time with AAA-quality graphics powered by Apple's Metal GPU framework. STUNNING VISUALS • Per-pixel metaball rendering creates smooth, organic shapes — no blocky grids • 3D lighting with dual specular highlights and Fresnel rim effects • Subsurface scattering simulates light passing through cell membranes • Bloom, chromatic aberration, and film grain for an authentic microscope feel • Six handcrafted visual themes: Vivarium, Deep Ocean, Ember, Aurora, Neon Pulse, Monochrome INTERACTIVE SIMULATION • Pinch to zoom into the cellular world • Draw cells with your finger — smart draw/erase detects your intent • Place classic patterns: Glider, Pulsar, Gosper Glider Gun, and more • Adjustable simulation speed from 1 to 60 generations per second • Four grid sizes from 64×64 to 512×512 CLASSIC PATTERNS INCLUDED • Glider — the iconic traveler • Lightweight Spaceship — fast-moving vessel • Pulsar — mesmerizing period-3 oscillator • Gosper Glider Gun — infinite glider factory • R-Pentomino — chaos from five cells • And more: Acorn, Diehard, Pentadecathlon BUILT FOR APPLE • Native Metal compute shaders for buttery-smooth 60fps • Resolution-independent rendering — pixel-perfect on iPhone SE to iPad Pro • Supports all orientations and screen sizes • iOS 26 Liquid Glass interface design • Zero data collection, zero ads, zero tracking Vivarium is completely free. No in-app purchases, no subscriptions, no compromise.