> For the complete documentation index, see [llms.txt](https://help.branch.io/llms.txt).

# Methodology

2 articles

- [Implement Attribution Methods](https://help.branch.io/developer-hub/implement-attribution-methods.md): Compare the mechanisms Branch uses to pass data into your app and attribute sessions back to their source. (updated 2026-09-08)
- [Deduplicate Second Installs With APIs](https://help.branch.io/developer-hub/deduplicate-second-installs-with-apis.md): Learn about iOS 14.5 changes mobile attribution and Branch's deduplication feature for accurate install tracking. (updated 2026-08-18)