What I want to do is, We have having one product info on Website. That product is available on store. what we have on website is that, Product info and one button for that p
You can achieve what you're asking for by using a URL scheme. This will enable you to call the openUrl:
method with your application's url scheme which will then launch your app.
Here's how you setup a custom url scheme:
You should now be able to open your app from Safari by typing myScheme:// in the address bar. Alternatively, from your app, you can launch the other app like this:
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"myScheme://"]];
Note that you can also send parameters to the app you're launching with the url scheme (more on that here).
With iOS9 Apple introduced a way to open installed app from Links. Here is the official link for this : Apple universal links