Can I set my form to ""Save & Keep Going"" based on a time interval of some sort?

I have explored the option of breaking up the form into smaller parts (in fact, I still may do this); however, due to the nature of this particular use case, even by breaking it up, part of my form might take more than an hour to complete, as it is tied to a 1 hour in-person observation. This form is filled out on an iPad as the observation occurs. mo_an the ultimate would you be able to help me piece this together perhaps?

Thank you!