Space Atlas vs Periodic Table

Space Atlas turns questions about the universe into short reads, in-depth stories and interactive experiments. EXPLORE THE UNIVERSE • A main library of 500 cosmic cards, 40 in-depth topics, 10 discovery routes and 5 interactive labs. • Compare eight planets by size, gravity, day length, year length and more. • Two additional mission experiments to explore satellite orbits and exoplanet transits. • Themed journeys connecting existing topics and routes. • An offline sky calendar with approximate Moon phases and meteor shower seasons. • Small and medium Home Screen widgets with the question of the day. FIND YOUR OWN PACE Start in Today, then search cards, topics, routes and labs in Discover. Save discoveries, pick up where you left off and follow your progress. In Profile, save a progress backup to a file, then preview and confirm before restoring it. Restoration replaces your current progress with the selected backup; it does not merge records. START FREE The main library includes 50 cards, 6 complete topics, 1 route and 2 labs for free. The two new mission experiments are also free. An optional one-time Premium purchase unlocks 450 more cards, 34 more topics, 9 more routes and 3 more labs, completing the full main library of 500 cards, 40 topics, 10 routes and 5 labs. No subscription or ads. Purchases and Restore Purchases are handled through Apple. MAKE IT YOURS Choose English, Turkish, Spanish or French. Use light mode, dark mode or your device's appearance setting. Enable an optional daily discovery reminder; notification permission is requested when you turn it on. No app account is required. Progress stays on your device and does not automatically sync between devices. Progress backups do not transfer purchase access or language/reminder settings. Core content and experiments work offline. Purchases, Restore Purchases and external source links require internet. Moon phases are approximate educational calculations (±1 day); the calendar does not predict local visibility or eclipses. Meteor dates are a seasonal guide. Cover artwork is illustrative, and experiments are educational models with stated assumptions.

EXPLORE 118 ELEMENTS A visual periodic table with properties, electron shells, history and uses. Search by name, symbol or atomic number, and zoom to explore. LEARN AND CALCULATE 182 reference topics, from basic concepts to organic chemistry. 14 solvers show their steps for balancing reactions, redox, oxidation states, molar mass, amounts of substance, solutions, pH and more. Consult solubility and other reference tables. Practise across 15 topics with feedback and explanations. PERIODIC TABLE PRO • Virtual lab: combine atoms and explore nearly 600 substances with animated molecules, properties, uses and safety information. • On-device AI tutor: ask in your own words. Equations and molar masses are checked with the app's calculation engine. • Scanner: photograph a reaction equation and balance it. • Unlimited practice sessions. The periodic table, element cards, handbook and solvers remain free. 20 LANGUAGES The app uses a supported device language on first launch. You can change it in the app; your choice is saved. Formulas retain their standard direction. Light and dark themes. PRIVACY AND AI REQUIREMENTS No accounts, ads, tracking or analytics. Reference content is available offline after installation. The AI tutor requires a compatible iPhone or iPad with iOS/iPadOS 26 or later, enabled Apple Intelligence and a downloaded model. AI language and region availability depend on the device and system version. Questions are processed on the device. Pro is available as a monthly or yearly subscription with a one-week free trial for eligible new subscribers, or a one-time purchase for lifetime access. Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Your Apple ID is charged after the free trial. Manage or cancel in App Store settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ultim8digital.github.io/periodic-table/privacy.html