Custom Form Updates TimeStamp

[#1]

I want to be able to capture via a calculated field when custom text field has been changed. Current option is to look at the update feeds Update feeds captures thru Audit Text when a field change is reported in the update feed showing the before and after. Extracting thru text mode the Audit Text Entry date and making know which custom form field you are looking for and its corresponding entry date is nearly impossible.

[#2]

This would be amazing! The ability to see the entry date/time stamp and person that updates a custom form without adding each question as a custom field to track would save my team so much time.