This font is part of iOS 10 software package so it cannot be downloaded separately. If you have installed iOS 10 it should be available. If you don't have it you can try some similar fonts here:
Kefa Bold font
Publisher
from iOS 10
License
$ Commercial
Date added
May 20 2019
Download Kefa Bold font. Kefa Bold by Copyright (c) 2006 - 2009 by Jeremie Hornus. All rights reserved.
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