Challenges

Join the fun with interactive ways to explore the latest technologies and frameworks. Share your creations on the Apple Developer Forums using the WWDC21 Challenges tag.

Tuesday
  • Achievement Unlocked – Fabulous Fails

    Graphics & Games

    Creating achievements that surprise and delight players as they make their way through a game can help provide a strong feeling of accomplishment, and even make people laugh. We challenge you to create or share a Fabulous Fails achievement that is fun, strange, and delightful.

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  • Animated artistry in SwiftUI

    SwiftUI

    Put trigonometry to good use and show us your artistic side by creating a stunning graphical animation in SwiftUI.

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  • Build an app that recognizes custom audio through ShazamKit

    Audio & Video

    ShazamKit lets you use custom audio catalogs inside your app to recognize that same audio “in the wild.” Dream up your own ShazamKit audio matching experience as you work off a starter sample project.

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  • Build an app using built-in Sound Classification

    ML & Vision

    With Sound Classification, you can create experiences for camera, video, productivity, and game apps on all Apple platforms — and for this challenge, we're inviting you to explore a sample project and build your own.

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  • Create your first 3D model with Object Capture

    Augmented Reality

    Object capture provides a quick and easy way to create lifelike 3D models of real-world objects using just a few images. Use the new Object Capture Swift API to build your very own 3D model from scratch.

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  • Design a quiz in Swift Playgrounds

    Coding & Design Essentials

    Design a “How well do you know me?” quiz using Swift Playgrounds to see who knows the most about your quirks and interests.

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  • Speech Synthesizer Simulator

    Accessibility & Inclusion

    Simulate a conversation using speech synthesis.

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Wednesday
  • Achievement Unlocked — Title Teasers

    Graphics & Games

    Some achievements can pique a player's interest into exploring something new in your app — even if the achievement only has its locked text visible. We challenge you to write a Title Teaser achievement that gets people excited about what they might uncover.

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  • Create a musical instrument in Swift Playgrounds

    Coding & Design Essentials

    The first part to composing a musical masterpiece is making your own instrument from scratch! Use graphical tools to create a musical instrument that will leave your audience floored (and waiting for an encore)!

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  • Design for declarative device management in your MDM solution

    Enterprise & Education

    Calling all MDM developers and enterprise administrators! Explore designing new declarative device management solutions that move management policies from the MDM server to the device.

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  • Design multi-step Shortcuts

    Design

    The best shortcuts help us get repetitive things done more easily: Develop a multi-step shortcut for designer or programmer productivity.

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  • Large Text Challenge

    Accessibility & Inclusion

    Design for large text sizes by modifying the user interface of a simple app.

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  • Throwback with SwiftUI

    SwiftUI

    Whether you've been coding for 40 years, you're new to the SwiftUI scene, or you're a designer — everyone loves a good callback. Give in to the nostalgia and imagine what your app might look like if designed for the Mac or iPhone interfaces of yesteryear.

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Thursday
  • Achievement Unlocked — Series Finale

    Graphics & Games

    Whether your game is divided into chapters, levels, or challenges, you can use achievements to help progress your narrative in unique and interesting ways. In our last challenge of the week — our series finale — we invite you to create a series of achievements that tell a story and encourage people to complete a set of tasks.

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  • Create amazing documentation

    Developer Tools

    Explore Xcode's new documentation features and learn how to add documentation to your own framework or package — or to your favorite open source project.

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  • Create fun visual effects in Swift Playgrounds

    Coding & Design Essentials

    Ever wonder how to make it seem like confetti is raining down from the sky? Or how to create a kaleidoscope effect using code? This challenge gets you to create an artistic rendering using only shapes and your imagination.

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  • Focus on Focus in SwiftUI

    SwiftUI

    Focus can help people move through your app efficiently, whether they're using the keyboard, Siri Remote, Apple Watch Digital Crown, or accessibility features. Find an interaction within your app and show us how you would use the SwiftUI Focus APIs to fine-tune that interaction.

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  • Framework Freestyle

    Augmented Reality

    One ARKit sample app. One framework of your choosing. What can you create in 100 lines of code or less?

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  • Memgraph capture the flag

    Developer Tools

    One of our engineers has hidden a memory easter egg in our secret app. We need your help to find it, but all we know is that it has the format `flag_<unknown_string_here>@WWDC`. Using only macOS command line tools, investigate the memory issue, recover missing symbols, and capture the rogue flag.

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  • Voice Control Synonyms

    Accessibility & Inclusion

    Challenge yourself to make your app accessible through Voice Control and provide support for voice-based interaction.

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Friday
  • Create an engaging tutorial

    Developer Tools (also Swift)

    Learn how to write an interactive tutorial to show developers how to use your own project — or add a tutorial to an existing open source project.

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  • Explore spatial audio soundscapes

    Audio & Video

    Use spatial audio to tell more immersive stories in your app and explore the demo used in the “Immerse your app in spatial audio” session.

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  • Prototype with SwiftUI

    SwiftUI (Also design)

    While SwiftUI is a powerful framework, one of its key features is its simplicity. Designers with very little knowledge of code can easily create prototypes with human-readable syntax and interactive Xcode Previews. As we say goodbye to WWDC21, we invite you to say “hello, world” with a brilliant SwiftUI-based prototype.

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  • Sense the world around you in Swift Playgrounds

    Coding & Design Essentials

    Just like our senses, our devices constantly gather data from their environment, and can use that information to do interesting and important things. In this challenge, you'll harness this device sensor data to create a visualization or experience of your choosing.

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  • VoiceOver Maze

    Accessibility & Inclusion

    Navigate to the end of a dark maze using VoiceOver as your guide.

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