Update: Time (only) field is now released! There is no need for any other workaround if you wish to only have a Time field in the form.
You can find the Time field under the Basic tab of the Form Elements in the build page of your form. Drag&drop or click the Time field to add it to your form.
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Time Field Properties (cogwheel icon)
General — In this tab, you will be able to change the field label of the Time field. You can also change the “Until” text that is shown when Time field’s range feature is enabled. Changing the sub-label of the hours and minutes is also available in this tab. Duplicating the field, setting it as required and aligning its field label are some of the other things that you can do under the General tab
Others — Here you will be able to set the difference between minute options and set the time format that you want to use. You can also restrict your respondents to select from only AM or PM periods.
The default time feature allows you to pre-populate the Time field with a custom value or current time.
Range — This is where you can enable the range feature of the field. Enabling this feature will show two Time fields to indicate a range. You can also choose to show the difference between the selected times in your form. You just have to enable the duration indicator option that is also available on this tab.
Advanced — Setting a “Hover Text” to show the field’s description when the field has hovered, making the field read-only so the value(s) cannot be edited or altered, shrinking the field and hiding it from the form are done in the Advanced tab. Here you can also view the details of the field.