---
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title: Opt-ins
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_mp_opt_ins.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_mp_opt_ins.htm&release=264.0.0&type=5
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content_type: documentation
content_hash: 0bb04bad957cd82565d0bf13de0f33b935fbf2c39f029b798ecb59425b099442
description: After contacts download your app and enable notifications, they’re opted in to receive your push notifications and messages that you create in MobilePush.
products:
  - Marketing
  - Marketing Cloud Engagement
release: "264"
---
# Opt-ins

After contacts download your app and enable notifications, they’re opted in to receive your push notifications and messages that you create in MobilePush.

For iOS, your app developer must set up your app to prompt contacts to opt in to notifications. For Android, notifications are enabled by default. To use location messages, prompt contacts to enable location tracking.

If contacts don’t enable notifications when they download the app, they can enable them later:

- On iOS devices, contacts set a switch to On in the Notifications section under Settings.
- Depending on the Android device, contacts either set a button or switch to **On** in notifications preferences within the app or allow notifications for the app in the Notifications section under Settings.

#### See Also

- [Integrate the MobilePush iOS SDK](https://developer.salesforce.com/docs/marketing/mobilepush/guide/ios-sdk-integration.html)