Get dynamic link clicked timestamp on device when app is installed through dynamic link

[crzycoder]

1. User created shortLink through app and share to their friends.
2. One of the friend clicked the link and link straight go to App store/Play Store.
3. but user did not install the app and after 2 days he install the app from App store/Play Store directly.
4. My app is still reading the dynamic link on their fist lunch and tell the referral Id of which user send the link.
5. The only thing he is not telling that when link is clicked on their device (Android / IOS). What I really want the clicked_timestamp of the link when user first installed the app.
6. I achieve on Android by using Google play referral api's but on IOS I'm still `blind.