Is there something wrong in my app?

Hi all As beginning I would like to clarify that this is not an attempt to advertise my Android app, I just want to understand if something is wrong in it. Since I went on a diet and now I have to control my weight, I developed an app to keep track of my weight and any other possible custom parameters. I admit that I developed this app for my needs, so it's perfect for me :-) however, comparing the features with the other apps in the ranking, it seems to me that it has all the required features. So I don't understand why users install it, look at it for a very short time and then uninstall it immediately. It is perhaps the interface that is not very comprehensive or does not attract enough? Can anyone give me his opinion on this? The app is this: https://www.producthunt.com/products/daily-weight Thank you to everyone will help me