I want to judge some app whether installed in webPage on ios device, in webPage has a button, when click it, if the app installed , open the app. else open app store to download the app. How to achieve it?
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Possible duplicate of [How to check if an app is installed from a web-page on an iPhone?](https://stackoverflow.com/questions/13044805/how-to-check-if-an-app-is-installed-from-a-web-page-on-an-iphone) – Lars Beck Jun 30 '17 at 07:45
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thanks for your reply! – soloso Jun 30 '17 at 07:52