iSPEX vs Periodic Table..

iSPEX is a hardware add-on for smartphones that analyzes the light that enters it in terms of its spectrum and its polarization.

Periodic Table is an interactive chemistry reference and learning app for exploring all 118 chemical elements, understanding periodic trends, studying chemistry, and solving common chemistry problems. Explore detailed element data, interactive visualizations, real-world applications, chemistry calculators, experiments, quizzes, exams, and educational stories—all in one chemistry app. Main features: Interactive Periodic Table — Explore all 118 elements with search, filters, element categories, states of matter, temperature controls, and property visualizations. Detailed Element Profiles — Study atomic structure, electron configuration, isotopes, oxidation states, physical and chemical properties, discovery history, abundance, compounds, uses, safety, and related elements. Trends & Visualizations — Explore atomic radius, electronegativity, ionization energy, electron affinity, density, melting point, boiling point, atomic mass, abundance, radioactivity, and periodic trends. Chemistry Lab — Explore chemical reactions, balanced equations, reaction types, energy changes, oxidation states, electron transfer, and molecules. Compare Elements — Compare multiple chemical elements side by side using property tables and interactive charts. Chemistry Tools & Calculators — Calculate molar mass, balance chemical equations, analyze isotopes and percentage composition, convert units, work with significant figures, and explore electron configurations, oxidation states, nomenclature, ions, solubility rules, constants, and chemistry formulas. Elements in Real Life — Discover elements in smartphones, the human body, Earth’s crust, atmosphere, oceans, cars, batteries, electronics, food, buildings, medicine, space, and jewelry. Chemistry Stories — Learn about chemical elements, scientific discoveries, chemistry history, technology, space, biology, and everyday chemistry. Quiz & Exam — Test your chemistry knowledge with customizable quizzes and timed exams. Failed Questions — Review incorrect answers and practice difficult chemistry topics. Progress Tracking — Follow quiz and exam performance over time. Favorites — Save important elements and chemistry content for quick access. Interesting Facts — Discover fascinating facts about chemical elements and chemistry. Advanced Search — Find elements using detailed chemical and physical properties. Periodic Table is designed for students, teachers, chemistry enthusiasts, and anyone who wants an interactive way to learn about elements and chemistry. LICENSED APPLICATION END USER LICENSE AGREEMENT: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/