In my case, it is in the "Useful" folder. The icon itself can be recognized because it is blue, it has a silhouette of a person in white jumping, and the grey tab in a triangle in the top-left corner of the icon.
Automatically, it takes us to the home page. As we can see, there are our calories for the day (they are not filled in this video), the option to connect, some blog posts, and, finally, our news feed. In the video, there is only one post.
The icon is blue and is located on the right-hand side. This will add our comment to the post. In the video, the posts are both from the same person, but we can comment easily on someone else's post too.
We can tap the white arrow in the top left-hand corner
This will bring us back on our home page where we began.
This is a VisiHow video. This was a tutorial on how you can add a comment and delete a comment on a post in the 'MyFitnessPal' application on the iPhone 6. If you have any questions or comments, please put them in the section below. Thank you very much for watching! Bye!