COSMOS vs Solve It! Pre

COSMOS is a solar system you hold in your hand. This is not a decoration. Every planet sits exactly where it is right now, computed from real orbital mechanics. Where is Jupiter tonight? How are Saturn's rings tilted? Open the app — the answer is there. - REAL ORBITS Positions of all 8 planets and the Moon are computed from Keplerian orbital elements in real time. Scrub through time to see the sky 10 years from now — or the day you were born. - PHOTO-REAL TEXTURES Saturn's rings, Jupiter's Great Red Spot, sunspots and solar granulation — every texture is generated on your device and stays crisp as you zoom. - CONTROL TIME From one second = hours, to one second = years. Watch the Moon change phase and the planets trace their orbits with your own eyes. - EXPLORE FREELY Pinch and swipe from outside the solar system down to a planet's face. Tap any body for details. - DESIGNED WITH RESPECT - No ads, ever - No in-app purchases — one simple price - Works fully offline, on a plane or on a mountain - Collects zero personal data For curious kids asking "why?" For stargazers who want a quiet moment of awe. The real universe, in your pocket. LANGUAGES English, Japanese, Simplified Chinese, Korean, Spanish, French, German

Solve It! teaches pre-algebra, the math that comes before Algebra 1, one idea at a time, with animated pictures that show why each rule works: why two negatives make a positive, why you flip and multiply, why the same move keeps a balance level. When a skill clicks, the Play tab turns it into a quick game. LEARN • 14 tracks and 66 short lessons on five paths. Numbers: Negative numbers, Fractions and decimals, Exponents and roots, Scientific notation, Real numbers. Proportion: Ratios and rates, Percent. Algebra: Expressions, Equations, Systems of equations. Graphs: Lines and slope, Functions. Geometry: Pythagorean theorem, Volume • Pictures for every idea: a thermometer, zero pairs, hops on a number line, x-bags, algebra tiles, an area model, a balance that makes the same move on both sides, ratio tables, double number lines, tape diagrams, percent bars, fraction bars, decimal grids, long division, square and cube stacks, slope steps on a grid, function machines, lines that cross, squares on a right triangle's sides, solids that fill up • Every lesson goes learn, practice, quiz, with no timer or lives • A wrong answer brings the picture back with a hint about that exact slip: adding the bottoms, flipping the wrong fraction, getting the sign wrong, reading a percent as dollars • Tell it where you are and it suggests a first lesson. Nothing is locked behind progress PLAY • Seven games: Integer blitz, Solve for x, Ratio tables, Percent of, Powers and roots, Find the slope, Right triangles • Pick the operations for Integer blitz, and one-step, two-step, negative or x-on-both-sides equations for Solve for x • Beat the clock for 1, 2 or 3 minutes with 3 lives, or get 20, 40 or 60 in a row on a stopwatch • Four answer choices, a ready-set-go countdown, and a cheer at streaks of 5, 10 and 20 • Best scores and times for every game and challenge, lesson progress and recent games on the Results tab PLAYERS • Optional local players, each with a name and an animal avatar • Each player's progress stays on this device FREE TO START All of Negative numbers is free, every lesson, and so is Integer blitz with every challenge. So is the first lesson of every other track. One in-app purchase unlocks everything else, once: the other 48 lessons and the Solve for x, Ratio tables, Percent of, Powers and roots, Find the slope and Right triangles games. No subscription. Family Sharing is on, so one purchase covers your family. PRIVATE AND AD-FREE No accounts, no ads, no analytics, no tracking. Your progress stays on your device. Works on iPhone and iPad, in portrait or landscape, in light or dark mode, with sound effects you can turn down or off.