Is it possible for an app to add contacts to a user's device?

Hi, I'm a project manager, not necessarily a developer so this will be a blunt, rookie question.

We're working on an app, part of it includes adding our phone number to the user's contacts during onboarding. This phone number will be called by the user later when they need our service.

Is there an easy or automated way to add convenience instead of having the user manually have to copy a number, and then create a contact?

Is it possible for an app to add contacts to a user's device?
 
 
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