metric values as default, change to proper values based on origin or option to change to metric
I noticed that cronometer is showing ounces while I am living in a country where the metric system is used. Looked around, but this doesn't seem to be configurable.
I would suggest to set metric values as a sane default, Everybody - except the US, Myanmar and Liberia - is using the metric system.
Another option could be to use metric or non-metric values based on the users location, or allow users to change it themselves.