Why is my Fitness app not updating on my iPhone and Apple Watch?

The fitness app has several flaws that are quite disappointing, especially considering the premium price of Apple products.

First, I am unable to invite certain people to compete with on the app—it consistently throws an error, which is frustrating.

Second, there seems to be a synchronization issue between my Apple Watch and iPhone. When I update my fitness goals on my Apple Watch SE (running watchOS 11.2), the changes don’t reflect in the app on my iPhone 15 Pro (running iOS 18.1.1), and vice versa. Instead of displaying the updated goals, the app simply shows a dash (“-”), which renders it unusable.

It’s surprising and disappointing to encounter such basic bugs on Apple products, especially after investing such a significant amount of money. I hope these issues can be addressed promptly.

[Re-Titled by Moderator]