It should let us choose what kind of workouts we like.

Users can earn practical items by achieving goals, or convert their exercise into a numerical value to make tangible contributions to the environment or charity.

Maybe to share my achievements with my workout partner

The best feature about a workout partner to match with your vibes. Since your workout partner is awesome they will motivate and work with you. You both will work together to achieve your goals.

It'd be cool if the app could match people based on fitness levels and goals.

Like if someone wants to lose weight and another person is also aiming for that, they can pair up

Both partners should be able to track their progress and share it with each other in the app. It’s motivating to see how you both are improving over time.

To know their goal! And see if they've done any challenges or completed anything else before that fits with what I want to do.

I enjoy playing badminton, but I'm unsure of how to find suitable courts in the Bay Area, as well as where to connect with players of similar skill level.

Imagine an app that pairs you with a workout buddy as perfectly as peanut butter pairs with jelly - essential features would include detailed fitness preferences, scheduling sync, and maybe a sprinkle of virtual high-fives for extra motivation! After all, finding the right sweat squad should be smoother than a burpee on a well-oiled gym floor, right?