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Humana Sans is out of my price range for App licensing, I'm hoping to find something similar that's open source:
The font you mention is ITC Humana Sans:
Of the free fonts I’ve skimmed through, Acme matches ITC Humana Sans the best. It’s a display font, but you may want to give it a try:
Acme was created by Huerta Tipográfica in Argentina.
It is licensed under the Open Font License.
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