Responsiveness is misleading

You have cited that the app is optmized for tablettes and you have used an icone of "Tablette + smartphone". However I couldn't use your plateform in my Samsung galaxy S8; and that was very dispointing because I use my phone to read a lot.
so I will stick with the EPUB version for the moment. However could you please optimize your app for smartphones or remove the mobile icon from the ads.