[zcash-android-wallet-sdk](../../index.md) / [cash.z.ecc.android.sdk.data](../index.md) / [Synchronizer](index.md) / [isSyncing](./is-syncing.md) # isSyncing `abstract val isSyncing: `[`Boolean`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) A flag indicating whether this Synchronizer is actively downloading compact blocks. When true, a UI element may want to turn yellow.