Using these instructions you will be able to create your application using ChatGPT and Appy Pie App Builder Plugin

Step 1: Define the main functionality - The primary function of this app is fitness tracking. This would include features that allow users to log different types of workouts (like running, weightlifting, yoga, etc.), set fitness goals, and monitor their progress over time.

Step 2: Identify additional features - Beyond the main functionality, the app should also have features that allow users to share their workout results with friends. This could be through social media integration or within the app itself if it has a community feature.

Step 3: Consider user interface and experience - The app should be user-friendly, with an intuitive interface that makes it easy for users to log workouts, view their progress, and share their results. It should also have a visually appealing design that motivates users to keep using the app.

Step 4: Specify platform compatibility - The app should be compatible with both Android and iOS platforms.

Step 5: Submit the detailed description to the Appy Pie App Builder Plugin - Once you've defined all these elements, you can submit this detailed description to the Appy Pie App Builder Plugin to generate your custom fitness tracking app.