Official documentation
supportsOnDeviceRecognition (Speech framework documentation)
Apple Inc., n.d.
Read the originalRead on October 17, 2026
- What it is
- Apple's reference page for the supportsOnDeviceRecognition property of SFSpeechRecognizer. It says whether the recognizer can work without network access, and that a request can only keep audio on the device when this property is true.
- How much weight it carries
- Official Apple API documentation, the primary reference for the property. It says what the property does, not which languages or devices have on-device support, so that has to be checked at runtime.
Facts taken from this source
- Apple's documentation says that when supportsOnDeviceRecognition is false, the SFSpeechRecognizer requires a network connection to recognize speech.
“requires a network in order to recognize speech” (Discussion)