WebMO Molecule Editor vs CDR RD Exam Prep 2026 Pocket

WebMO allows users to build and view molecules in 3-D, visualize orbitals and symmetry elements, lookup chemical information and properties from external databases, and access state-of-the-art computational chemistry programs. WebMO is recommended for students and faculty in high school, college, and graduate school who desire mobile access to molecular structures, information, and calculations. WebMO capabilities include: - Build molecules by drawing atoms and bonds in a 3-D molecular editor, or by speaking the name (e.g., “aspirin”) - Optimize structures using VSEPR theory or molecular mechanics - View Huckel molecular orbitals, electron density, and electrostatic potential - View molecular vibrations - View point group and symmetry elements of molecules - Lookup basic molecular information, including IUPAC and common names, stoichiometry, molar mass - Lookup chemical data from PubChem and ChemSpider - Lookup experimental and predicted molecular properties from external databases (NIST, Sigma-Aldrich) - Lookup IR, UV-VIS, NMR, and mass spectra from external databases (NIST, SDBS) - Capture high-resolution molecular images - Save and recall molecular structures locally - Export and import structures via email WebMO is also a front-end to WebMO servers (version 14 and higher): - Supports Gaussian, GAMESS, Molpro, MOPAC, NWChem, ORCA, PQS, PSI, Quantum Espresso, VASP, Q-Chem, and Tinker computational chemistry programs - Submit, monitor, and view calculations - View formatted tabular data extracted from output files, as well as raw output - Visualize geometry, partial charges, dipole moment, normal vibrational modes, molecular orbitals, and NMR/IR/UV-VIS spectra

1,500 independent practice questions for the CDR Registration Examination for Dietitians (RD / RDN). Mapped to all 4 current exam domains. Start free — no subscription required to begin. This is a dedicated RD exam app. Study Nutrition Care, Principles of Dietetics, Management, and Foodservice Systems on your iPhone — including offline after download. FREE (no subscription required) • Browse all 4 RD domains and start practicing immediately • First 3 explanations unlocked in each topic practice session • Study Path Set 1 with complete answer explanations • Today's Question with complete answer explanations • Progress, streaks, bookmarks, and history stored on your device You can learn the "why," not just tap letters — before you ever pay. PREMIUM (optional weekly or monthly subscription) • Full explanations on every remaining question — not only the free previews • Remaining Study Path sets across all 4 domains • Unlimited practice, missed-question drills, and saved-question review • Timed mock exams: 145 questions in 180 minutes • Quick Review and Intermediate timed drills • Ask-AI study coach for hints and concepts • Readiness tracking against a 70% practice target (official passing score is a scaled 25, not 70%) WHAT'S IN THE BANK • 1,500 independent RD-style practice items (not official CDR exam questions) • Stems mapped to the four-domain Registration Examination for Dietitians content outline • Weak-category, most-common, and toughest-question drills • Works offline after download — the question bank lives on your device DOMAINS IN THIS APP • Nutrition Care for Individuals and Groups (45%) • Principles of Dietetics (21%) • Management of Food and Nutrition Programs and Services (21%) • Foodservice Systems (13%) Always confirm current domains, weights, item count, fees, and scoring at cdrnet.org before you sit. OFFICIAL EXAM FACTS (always confirm on cdrnet.org) • Exam: Registration Examination for Dietitians, administered by CDR • Format: computer-adaptive, variable length • Length: 125–145 multiple-choice questions in 3 hours • Items: 100–120 scored questions plus 25 unscored pretest questions mixed in • Scoring: scaled 1–50; passing scaled score is 25 This app's mock is a 145-question / 180-minute practice exam with a 70% practice target. It is not computer-adaptive, not the official exam, and does not issue an RD or RDN credential. WHO IT'S FOR • Dietetic interns and ACEND-pathway students preparing for CDR registration • Candidates sitting the Registration Examination for Dietitians • RD and RDN applicants reviewing all 4 domains • Repeat testers who need timed mocks and missed-question review SUBSCRIPTIONS RD Exam Prep Premium is an auto-renewing subscription billed through your Apple ID. Payment is charged at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. Manage or cancel in Settings > Apple ID > Subscriptions. Any unused portion of a free trial, if offered, is forfeited when you purchase a subscription. Privacy Policy: https://sites.google.com/view/sv56developer/privacy-policy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ DISCLAIMER This app is an independent study aid. It is not affiliated with, endorsed by, or sponsored by the Commission on Dietetic Registration (CDR) or the Academy of Nutrition and Dietetics. "CDR," "RD," and "RDN" are used only to describe the exam this tool prepares you for. Practice questions are independent study material and are not CDR exam items. Always confirm current exam content, format, fees, and passing standards at cdrnet.org.