STEEZY vs Deltarium

STEEZY is the #1 dance studio on your iPhone, iPad, or smart TV – use it to learn to dance step-by-step, at a pace that works for you. Copying music videos will only get you so far. If you really want to master the dance styles of today, you need to learn from the best dancers and instructors. STEEZY brings the professionalism of a world-class dance school to you. STEEZY instructors are the best in the game. You’ll regularly find them competing in international competitions, touring, or starring in music videos, and they are here to teach YOU! Step-by-step instructions help you learn the moves AND understand the fundamental techniques so you can build your confidence and become a better dancer. The unique STEEZY digital studio technology allows you to watch dance teachers demonstrate moves from different angles, adjust the tempo of your class, play any move or section on loop while you practice. You can even cast directly to your TV. Save your favorite classes to take as many times as you like. Or take one of our guided programs to master your chosen style. Styles include: Hip-hop Ballet Contemporary Jazz K-Pop Dance Workout Popular Choreography House Breaking Popping Whacking Krump Heels With 1000+ classes, and more being added every week, there's always more styles and fun routines to explore. Classes range from complete beginner to expert, so jump in wherever you’re comfortable and you’ll be grooving in no time. What are you waiting for? Get up and dance now! Subscription pricing and terms: Steezy Studio offers an auto-renewing yearly subscription at $99.99/year to provide you with unlimited access to Steezy Studio with an active subscription. Payment will be charged to the payment method connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period.Your account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after the purchase. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. Read more about our terms and conditions here: Terms of Service: https://www.steezy.co/terms Privacy Policy: https://www.steezy.co/privacy

Deltarium is a place to walk among worlds, the way a planetarium is a place to walk among stars. Each world is a living system of change. You move a few sliders, press play, and watch what the mathematics does: rabbits and foxes chase each other in cycles, a chaotic attractor traces its butterfly wings, a rocket bends time on its way to another star. Built for kids and curious people first, and for scientists too. There is nothing to sign into, nothing to buy, and no ads. The app runs entirely on your phone and collects nothing. THE 8 WORLDS PREDATOR AND PREY. The classic hare-and-lynx cycle. Set the birth, hunting, and dying rates and watch the populations chase each other around a loop. A guided tour walks through this world one step at a time. THE BUTTERFLY. The Lorenz attractor in 3D, spun with a finger. Turn on the twin path, which starts a hair away from the first, and watch the two separate. The butterfly effect you can see. ESTUARY. A coastal model of nutrients and life that blooms and crashes with the seasons. THE DANCE. Three stars pulling on each other, including the famous figure-eight where they chase one another forever. PARKING IN SPACE. The 5 Lagrange points, the spots where a small craft can hold its place relative to the Earth and Moon. Give all 5 a shared kick and see which ones stay parked and which wander off. RADIOACTIVITY. How a radioactive source fades over time, following the real decay chain from a parent down through its daughters. TIME DILATION. A rocket that holds a steady 1 gravity of thrust all the way to a distant star, flipping over at the midpoint to slow down. The clock on the ship and the clock back on Earth pull apart. BUILD YOUR OWN. Write your own equations, add sliders for the parts you want to tune, and watch the system run. UNDER THE HOOD Every world is a real system of ordinary differential equations, solved on your phone by the same numerical method scientists use. Each screen carries a science card naming the model, its author, and a reference you can look up. The phone's engine is checked against a published Python reference, and all the source code is public at github.com/evanleeturner/deltarium-iphone.