Federated Learning. It's something Google does at the Android level, but I don't think they provide an API for app developers to train on device. Another use c

Federated Learning. It's something Google does at the Android level, but I don't think they provide an API for app developers to train on device. Another use case is privacy: ship a pretrained facenet style model and let it learn to map your address book to faces in your photos without your data leaving the device.