Gotta have!
I use this app more than I thought and when I was mixing a Patròn Majito the only shot glass I had measured 2 & 4 cL ?? This app solved the oz convert so I bought the app.... its great ads or no ads, definitely worthy!
Update 9/2016- still using the app, one of the few kept update and always gets better each time!
dpholz about
Mila's Tools PRO Converter, v1.13.1