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# WCSessionActivationState

Constants indicating the activation state of a session.

```
enum WCSessionActivationState
```

## Topics

### Constants

[`WCSessionActivationState.notActivated`](/documentation/WatchConnectivity/WCSessionActivationState/notActivated)

The session is not activated. When in this state, no communication occurs between the Watch app and iOS app. It is a programmer error to try to send data to the counterpart app while in this state.

[`WCSessionActivationState.inactive`](/documentation/WatchConnectivity/WCSessionActivationState/inactive)

The session was active but is transitioning to the deactivated state. The session’s delegate object may still receive data while in this state, but it is a programmer error to try to send data to the counterpart app.

[`WCSessionActivationState.activated`](/documentation/WatchConnectivity/WCSessionActivationState/activated)

The session is active and the Watch app and iOS app may communicate with each other freely.


---

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