Modify app

Low cost win. Please look at the attached image. I have an app to make non arabian user easy to share arabic texts. I need a freelancer to do these following things: 1. To add "sticker for whatsapp" tab that consists of a list view of sticker pack like this app [login to view URL] I dont already have the sticker packs. So you may use random flower png files. And I'll change later myself. 2. I want there is in-app purchase for some particular sticker packs. (Or ask user to buy the full version app) 3. I also want in-app purchase for some arabic text user want to share. 4. I have a webview in my app and I want when a link clicked, it opened in a browser, not in the webview. 5. Pop Up Notification when there is an updated version of the app.