Nowadays, in the era of modern technology vastnumber of users using Smartphone and use necessary applications while there is no doubt that tourism app are installed their phone as well. Tourism app has given guideline which is useful at stages of tourist ’s activity. For consumer ’s objective is to confirm relevant information about tourism which satisfied users also to ensure quality of app, lacking of particular part and give suggestion what should be taken in future that conducted by SUS method. Therefore in this study accomplished by SUS and illustrates the trouble of those tourism app that should be updated. Some tourism and travel applications get high rating of application scale in spite of huge lacking. Those identified tourism app ’s usability tested and reported those apps doesn ’t fulfill SUS standard score and that is why given suggestion where should be improved. This study aims to identify how these apps become top rated apps without good usability feedback. Researchers willget to know about the lacking of tourism app which identified by using SUS and possible way should be taken by new researchers in relevant field