What link to send in an email to open the installed application on Android and iOS phones?

Question

Client side optimization

Tell knowledgeable people, you need to send an email to confirm your account, how to generate a link in the body of the email for activation in order to open a directly installed application on your phone, both on iOS and on Android:
I do not work like this

<a href='instagram://main'>Для iOS</a>
<a href='instagram://main'>Для Android</a>

Answer 1

Depends on what?
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There are such links: https://developer.apple.com/library/archive/docume...
They allow by going to the site , say YouTube.com, to be thrown directly into the application. For this type, you need to be the owner of both the site and the application.
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There are application-specific links. Each has its own links. Here is an example of what Instagram has
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And there are buttons with a transition to the Appstore: https://linkmaker.itunes.apple.com/en-us