Detect if certain app is installed on user's device?

[MJK]

Is it possible to detect if certain app is installed on user's device, and if yes, then launch that app? And on the other hand, if that app is not installed, send the user to the App Store to download it?

[AyreGuitar]

If your app uses an iPhone URL scheme (like Facebook uses fb://), then you can try accessing it using the URL scheme, then have another action straight after it that sends user to the app store. If the app exists, the URL scheme should kick in and open the app, ignoring the app store link (you might need a 3rd action to jump to your main menu frame when the user comes back to your app, can't remember for certain).

I did something like this for easy Twitter following within my Paper Face app using these URLs:
twitter://user?screen_name=purplewaxgames
https://twitter.com/PurpleWaxGames

Not sure how easy it is to make an MMF2 app use iPhone URL scheme (especially since someone else my use the same URL for their app!), but if you want it for something like facebook or twitter that already uses it, then should be straight foreward.

Here's some more on iPhone URL Schemes that may help:
http://wiki.akosma.com/IPhone_URL_Schemes
http://community.clickteam.com/threads/82216-Facebook-shares-It-s-possible?highlight=facebook+shares.+it%27s

[MJK]

Thanks, I'll take a look.