> 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/no-data/delivery-delays-lag/phone-platform-sync-lag.md).

# Why does weight from phone health apps arrive with delays?

Delays for phone-based health platforms are usually **phone-to-cloud sync lag, not the API**. Terra pulls data as soon as the provider's APIs make it available.

* Google Fit's app can be slow syncing to the cloud.
* For Apple Health, ask users to turn **off** Low Power Mode, enable Background App Refresh for your app, and ensure [background delivery is configured](https://docs.tryterra.co/health-and-fitness-api/mobile-only-sources/ios-swift) per the docs.