Official documentation
requiresOnDeviceRecognition (Speech framework documentation)
Apple Inc., n.d.
Read the originalRead on October 17, 2026
- What it is
- Apple's reference page for the requiresOnDeviceRecognition property of SFSpeechRecognitionRequest. It says the property stops a request sending audio over the network, and that on-device requests are less accurate.
- How much weight it carries
- Official Apple API documentation for the property. Apple does not give a size for the accuracy gap, so it is a direction, not a measurement.
Facts taken from this source
- Apple says that setting requiresOnDeviceRecognition stops the request sending audio over the network, and that on-device requests are less accurate.
“from sending audio over the network. ... However, on-device requests won’t be as accurate.” (Discussion)