Substring-before and substring-after

substring-before substring-after functions do not work in kobocollect (mobile version) but in the web version they do, is there a way to get only the time (hours) using some function that both versions support.
WEB
subweb
MoBILE




XLS

Hello @gwen1805,
You may (better) use the format-datetime function. See https://getodk.github.io/xforms-spec/#fn:format-date-time

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