> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/data-api-sdk/webhooks-dedup-and-sync-reliability/apple-health-multi-source-dedup.md).

# How do I dedupe multiple sources behind Apple Health?

For Apple Health, payloads can combine data from **multiple contributing apps**:

* Sources appear in `device_data.name` (e.g. package or app names), with additional sources in `other_devices`.
* Custom device names only come from Apple devices; third-party apps report fixed names.

To exclude specific sources at the SDK level, **use `setIgnoredSources` with the apps' bundle IDs** so their contributions are dropped before payloads are generated.

Apple supplies raw overlapping sleep samples that the SDK deduplicates and aggregates. Older SDK versions had known duplicate and overlapping-sleep issues, so check your SDK version and **update to the latest release**, which includes improved aggregation, then verify the feeds normalise.