# Subscription & Marketing

- [Klaviyo Email Subscription](/features/subscription-and-marketing/klaviyo-email-subscription.md): Collect customer emails in your mobile app and sync them with Klaviyo to send welcome emails, promotions, and marketing campaigns automatically.
- [Omnisend Email Subscription](/features/subscription-and-marketing/omnisend-email-subscription.md): Collect customer emails in your mobile app and sync them with Omnisend to send welcome emails, promotions, and marketing campaigns automatically.
- [Meta SDK integration](/features/subscription-and-marketing/meta-sdk-integration.md)