# Add users in app through contact list

**URL:** <https://forums.kodeco.com/t/add-users-in-app-through-contact-list/17334>\
**Category:** Swift\
**Created:** [July 14, 2016, 8:31am UTC](https://forums.kodeco.com/t/add-users-in-app-through-contact-list/17334 "2016-07-14T08:31:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![harsh08](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/harsh08/32/37385_2.png) [@harsh08](https://forums.kodeco.com/u/harsh08)\
**Post date:** [July 14, 2016, 8:31am UTC](https://forums.kodeco.com/t/add-users-in-app-through-contact-list/17334/1 "2016-07-14T08:31:30Z")

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Hello,

Thank you for all the great tutorials! I was wondering how the apps like whatsapp and splitwise adds users to send notifications? does that require backend?