# Custom Spans

The KMP APM module exposes **flows** and **UI traces** for custom timing:

* **Flows**: `APMKmp.startFlow(name)`, `APMKmp.endFlow(name)`, `APMKmp.setFlowAttribute(name, key, value)`
* **UI traces**: `APMKmp.startUITrace(name)`, `APMKmp.endUITrace()`

Use these to represent custom operations or user journeys. For lower-level “span” APIs (e.g. custom duration spans), behavior depends on the native Luciq SDK. If the native Android or iOS SDK supports custom spans, they may be available only from platform-specific code; the KMP API surface is focused on flows and UI traces. Check the [Luciq Android](https://docs.luciq.ai/android/set-up-luciq-for-android/logs-and-profiling/custom-spans) and [Luciq iOS](https://docs.luciq.ai/ios/setup-luciq-for-ios/custom-settings/logs-and-profiling/custom-spans) docs for native span APIs.


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