Validating a time field against another time field

[Kal_Lam]

@mkamzati, you could do it as advised by @wroos following the image shared below:

In the survey tab of your XLSForm:

Data entry screen as seen in Enketo: when End time is less then the Start time

Data entry screen as seen in Enketo: when Start time and End time are same

Data entry screen as seen in Enketo: when End time is greater then the Start time

Reference XLSForm:

TIME.xlsx (9.9 KB)