As tourist I had a bad experience with this app. When was arrived to abudhabi I installed and updated all related asking documents, but my vaccination certificate not approved and showing 'pending for approval'. therefore, Alhosn showing Grey color. One day once I going to Dubai and return back to abudhabi, in Abudhabi border they not allowed to enter there and return send back to Dubai. I try to explain the issue and try show the original documents too. But Their goal was to send me back.