Do you have android app or app for iPhone or windows phone app listed on Googleplay or apple store or windows store ? Then install this Promote Your App WordPress plugin , the visitors to your website will get a chance to download your app .
Please watch FULL video including actual demo https://youtu.be/DiRo-9xPGkc
The beauty of app detecting automatically the type of device and directing the users to the relaxant app markets. So if the visitor is on an android device , he will be redirected to Google Play , where as a visitor on iPhone will be redirected to apple store. Similarly a visitor on windows phone will be redirected to download page on windows store.