MM - Challenge you

It's time to find your strength in numbers!
Collaborate or compete in team movement challenges with your friends, family and colleagues. Track your activities, set daily habits, and chat and share your progress with everyone. Motivate and inspire your team with our challenge feed, the new home for all your challenge news.
The result? You’ll get out of bed, put that kit on and hit those goals.
Magic Mountain uses HealthKit to import activities and body metrics from the Apple Health app to Magic Mountain. Magic Mountain automatically reads activities from other wearables and apps and sync these to your challenges. The app reads your body metrics so your manual submissions are as accurate as possible.
You can subscribe and pay through your iTunes account. Payment will be charged to your iTunes account after any applicable free trial periods. In the case of an introductory price, payment will be charged to your iTunes account at confirmation of purchase. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. Subscriptions may be managed by the user and auto-renew can be turned off after purchase in your iTunes account settings. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription. You can cancel at anytime.

For more information
Magic Mountain Terms of Service - https://magicmountain.app/terms/
Magic Mountain Privacy Policy - https://magicmountain.app/privacy-policy/
End User License Agreement - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/