Physics Formulas vs Bio Lexicon

PhysRef is the complete physics formula reference designed for students, engineers, and science enthusiasts. Access hundreds of formulas, physical constants, and built-in calculators - all without internet connection. COMPREHENSIVE FORMULA DATABASE Browse formulas organized by topic: Mechanics, Thermodynamics, Waves, Electricity and Magnetism, Optics, and Modern Physics. Each formula includes variable definitions, units, and related concepts. BUILT-IN CALCULATORS Stop doing manual calculations. Enter your known values and instantly compute the unknown variable. Every calculator validates inputs and displays results with appropriate units. PHYSICAL CONSTANTS TABLE Quick access to fundamental constants including speed of light, gravitational constant, Planck's constant, electron mass, Boltzmann constant, and dozens more. All values use standard reference data. UNIT CONVERTER Convert between units across 14 categories: length, mass, time, velocity, acceleration, force, energy, power, pressure, temperature, electric charge, electric current, angle, and frequency. PERSONAL NOTES Add your own notes to any formula. Perfect for exam prep, recording problem-solving strategies, or marking formulas you find tricky. FORMULA DERIVATIONS Understand where formulas come from. See step-by-step derivations that connect fundamental principles to the equations you use. WORKS COMPLETELY OFFLINE All content is bundled in the app. Study on airplanes, in basements, or anywhere without signal. No account required. No internet needed. DESIGNED FOR STUDENTS Covers content from AP Physics 1, AP Physics 2, AP Physics C, IB Physics, and introductory university physics courses. Whether you are preparing for an exam or solving homework problems, PhysRef has you covered. PRIVACY FIRST Your data stays on your device. We do not collect personal information. No tracking. No analytics. No ads. FEATURES SUMMARY - Formula browser organized by physics topic - Search by formula name, variable, or concept - Calculators for solving problems - Physical constants with precise values - Unit converter with 14 categories - Personal notes on any formula - Formula derivations and explanations - Related formulas and connections - Bookmarks for quick access - Search history - Dark and light themes - 100% offline functionality Built for physics students who want a reliable, ad-free reference that works anywhere. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Bio Lexicon puts a complete biology dictionary in your pocket. Whether you are revising for an exam, preparing a lesson, or simply curious about a term you came across, this app gives you everything you need to understand it properly. Every one of the 557 entries includes a clear definition, phonetic pronunciation, part of speech, a real-world example, etymological roots, historical context, and a concise memory hint. Tap any term to see its full detail card. Star the ones you want to revisit later. The built-in search bar lets you find any term instantly. You can also browse alphabetically or filter by topic — tap a category tab at the top to narrow the list to just the branch of biology you are studying. WHAT EACH ENTRY INCLUDES - Definition — a precise, exam-ready explanation of the term - Pronunciation — phonetic guide so you can say it correctly - Example — a sentence placing the term in real-world context - Etymology — the Greek, Latin, or other roots behind the word - First Described — who coined or discovered the concept and when - Hint — a short memory aid to help the term stick - Related Terms — links to connected concepts in the lexicon 11 BIOLOGY TOPICS - Anatomy — body systems, organs, tissues, skeletal and muscular structure - Biochemistry — enzymes, metabolic pathways, macromolecules, ATP - Cell Biology — organelles, membrane transport, mitosis, meiosis, cell signalling - Ecology — food webs, ecosystems, population dynamics, biodiversity - Evolution — natural selection, speciation, phylogenetics, evidence for evolution - Genetics — inheritance, DNA replication, gene expression, mutations - Immunology — innate and adaptive immunity, antibodies, vaccination - Microbiology — bacteria, viruses, fungi, protists, antibiotic resistance - Molecular Biology — DNA technology, PCR, CRISPR, recombinant DNA - Physiology — homeostasis, endocrine signalling, nervous coordination - Plant Biology — photosynthesis, transpiration, plant hormones, reproduction TEST YOURSELF Switch to Quiz mode and choose a topic. Each quiz presents 20 true-or-false statements drawn from the lexicon. Answer correctly to build your streak. Get one wrong and you will see a detailed explanation of the correct answer — every mistake becomes a learning moment. If you want another chance, watch a short reward video to continue where you left off (up to 2 continues per round). Your best streak for each topic is saved so you can track your progress over time. DESIGNED FOR COMFORTABLE STUDYING Bio Lexicon supports both light and dark mode, adapting to your system appearance automatically. The interface is native on iPhone and iPad, with a layout that makes it easy to scan entries quickly or read them in full. FREE TO DOWNLOAD Bio Lexicon is completely free. The app is supported by ads, with optional reward videos during quizzes.