Launch an App from Within Another (Iphone)

Can I launch one app from other app on iPhone

Yes you can achieve this using custom URL Schemes. See Communicating with Other Apps.

App B will need to register a custom URL Scheme which App A uses to launch B and pass it commands.

The following code fragment illustrates how one app can request the services of another app. “todolist” in this example is a hypothetical custom scheme registered by App B.

NSURL *myURL = [NSURL URLWithString:@"todolist://www.acme.com?Quarterly%20Report#200806231300"];
[[UIApplication sharedApplication] openURL:myURL];

Cannot Launch an app from within another (iPhone)

Add the custom Url in info.plist

1st image - In Your App which you are opening

2nd Image - In Your App which from you are opening

For full explanation and code visit my blog here

Open a app within an app or if not already downloaded, got to app store (iOS)

   if UIApplication.shared.canOpenURL(other app scheme)
    {
         UIApplication.shared.open(other app scheme)
     }else {
         UIApplication.shared.open(AppStore url)
    }

Swift: How to open a new app when UIButton is tapped

Try this. For example you want to open an Instagram app:

let instagramHooks = "instagram://user?username=johndoe"
let instagramUrl = URL(string: instagramHooks)!
if UIApplication.shared.canOpenURL(instagramUrl)
{  
    UIApplication.shared.open(instagramUrl)
} else {
    //redirect to safari because the user doesn't have Instagram
    UIApplication.shared.open(URL(string: "http://instagram.com/")!)
}

How to launch another app from an iPhone app

Try to do this way :

NSString *wazeAppURL = @"waze://";
NSString *mapsAppURL = @"maps://";

BOOL canOpenURL = [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:wazeAppURL]];

NSString *url = canOpenURL ? wazeAppURL : mapsAppURL;
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];

Here, canOpenURL allows you to test if the Waze app is installed on your iPhone. if iPhone can open the url waze:// it means you already have the app and it will launch it. Otherwise it will launch the default Maps app. Safari won't be called.

Launch Another IOS App from Xamarin Forms App

You need to add the URL Scheme of the target app into the info.plist file in order to use canOpen functionality. i.e

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