android - Checking if the right instance of an app is running locally _before_ presenting a link in a webpage -

android - Checking if the right instance of an app is running locally _before_ presenting a link in a webpage -

i’m creating application @ point requires user confirm email address or phone number. confirmation purposes link sent user. naturally, user can switch application on ios device open link or may utilize device so.

i implement method detecting if user opened link on same device app running , if initiate redirect app resume process (app registered handler of specific uri scheme). in case user opened link on device has same app installed don’t want redirect happen.

is possible context of safari javascript find out if page beingness open on same device instance of app running? (the app , in background don't suppose running http service in of good)

i open special page app drop cookie later can detected wouldn’t nice since user have see browser flicker if sec (before page redirects him app)

are there solutions problem in post udid ios world? easier on android?

android ios security deep-linking