In order to make use of our gathered data and trained models, we developed a tool prototype, which aims to predict the price range of the application given by users. This prototype can be useful in following scenarios: When some inexperienced app providers want to publish their new app but do not know how much the price of this app should be; When app providers want to charge on their existing app which is free previously. They would get a more accurate price suggestion since they already have some useful data from the market such as number of reviews and star rating; When app providers want to publish a paid version of an app after the free version. They also will get a lot of data and feedback from the existing free app. Users input their applications' information like category and description, then get a result of the predicted price range as well as a list of similar applications.