Check-in and check-out feature in Zoho Mobile CRM

Check-in and check-out feature in Zoho Mobile CRM

Some of my clients are asking to a check-in and check-out feature via the Zoho CRM mobile App, so the their sales team would have to prove a visit to a client via GPS check-in and check-out. 

My question is: 

Is it possible? How? If not wouldn't be great?

Thanks!