價格：免費
檔案大小：6.4 MB
版本需求：需要 iOS 8.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：簡體中文, 繁體中文, 英語
*Create a challenge and send it to a specific person or share it with all your contact and find out who dares to accept and complete it.
*See the most popular challenges daily and find out if there are any that you might be interested in.
*Discover people who you want to follow for more interesting challenges.
*Create a group in which you can easily challenge all your friends at once.
*Be creative and challenge many around you to do good and have fun.
*See who where you rank among your friends in completing challenges.
*Create your account using Email, Facebook or Twitter.
支援平台：iPhone