Assuming this app uses the Segment SDK, the SDKs are open source and you can see the implementation details yourself, e.g. https://github.com/segmentio/analytic

Assuming this app uses the Segment SDK, the SDKs are open source and you can see the implementation details yourself, e.g. https://github.com/segmentio/analytics-android https://github.com/segmentio/analytics-android. There's a high level overview at https://segment.com/blog/lifecycle-of-a-mobile-message https://segment.com/blog/lifecycle-of-a-mobile-message.