Periodic Table vs PrepAce

Chemistry Explorer brings an interactive periodic table, 2D/3D molecules, an equation balancer, and 29 chemistry tools into one focused app for students, teachers, and curious minds. PERIODIC TABLE, PERFECTED • All 118 elements in a clean, color-coded layout • Tap any element for properties, isotopes, spectra, and real-world uses • Instant search by name, symbol, or atomic number MOLECULES IN 2D & 3D • Enter any valid SMILES to generate a structure with RDKit • Search 352 curated molecules by name or formula • Calculate molecular weight, logP, TPSA, and more on device • Rotate and explore structures in interactive 3D OFFLINE MOLECULE DATABASE • Chemistry Pro unlocks all 8,000 included compounds • On iOS 26.1 or later, Pro can download the complete 467,735-compound library through Apple 29 TOOLS FOR CHEMISTRY, 25 OF THEM FREE • Balance equations; calculate molar mass and stoichiometry; explore pH/pOH, buffers, gas laws, kinetics, equilibrium, solutions, and more DESIGNED FOR FOCUS • Chemistry calculations and molecular processing run on device; no account required • English, Français, 简体中文, 繁體中文, 日本語, Español, Deutsch, Português, 한국어, Русский, and Tiếng Việt • Optimized for iPhone and iPad Twenty-five of the twenty-nine tools are free, the reaction predictor and every reference table among them, plus two SMILES builds a day and all 352 curated molecules. Chemistry Pro is available as monthly, yearly, or lifetime access and unlocks the other four tools — buffers, equilibrium, reaction rate, and Arrhenius — along with unlimited SMILES builds and all 8,000 bundled compounds. Paid users of the original app keep Legacy Pro. Daily free advanced-tool choices: 1. Reopening a chosen tool that day is unlimited. Usage and crash reporting are on by default. You can turn them off in Settings. No advertising ID is collected. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Get ready for the Digital SAT, one question at a time. PrepAce gives you SAT-style practice for Math and Reading & Writing. Every question comes with a clear, step-by-step solution, so you don't just see the right answer: you understand how to get there. WHY STUDENTS LOVE PREPACE • SAT-style questions written in the same format as the Digital SAT • Step-by-step solutions for every question • Hints when you get stuck • Concept reviews right when you need them • Missed questions come back until you master them • A Question Library to review everything you've gotten right BUILT ON THE OFFICIAL SAT DOMAINS Math: Algebra · Advanced Math · Problem-Solving & Data Analysis · Geometry & Trigonometry Reading & Writing: Information & Ideas · Craft & Structure · Expression of Ideas · Standard English Conventions STAY MOTIVATED • Set your target score • Build a daily study streak • Earn XP and climb the leaderboard • Optional study reminders, never spam START FREE, GO PRO WHEN YOU'RE READY Try free sample questions at no cost. PrepAce Pro unlocks every question and every topic, plus unlimited lives so you can make mistakes and keep learning. SUBSCRIPTION INFORMATION • PrepAce Pro is offered as weekly, monthly, and 6-month auto-renewable subscriptions. • Payment is charged to your Apple ID at confirmation of purchase. • Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the period ends. • Introductory offers, when available, apply only to the first billing period. • Manage or cancel anytime in your App Store account settings. SAT® is a trademark registered by the College Board, which is not affiliated with, and does not endorse, PrepAce. IMPORTANT NOTICE PrepAce is a private and independent educational resource. It is NOT affiliated with, endorsed by, or sponsored by the College Board, the organization that develops and administers the SAT®. SAT® is a trademark registered by the College Board, which is not affiliated with, and does not endorse, this app. We do not register students for the SAT, administer the exam, or report scores. Our practice questions are independently written study materials; they are not official SAT questions and do not guarantee any score, admission, or scholarship. For test dates, registration, fees, policies, and official practice tests, always consult official sources. OFFICIAL SOURCES ABOUT THE SAT: - SAT Suite of Assessments (College Board): https://satsuite.collegeboard.org/sat - SAT Registration: https://satsuite.collegeboard.org/sat/registration - Official SAT Practice: https://satsuite.collegeboard.org/practice - College Board: https://www.collegeboard.org TERMS OF USE (EULA) This app uses Apple's standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/