All of my customers details and invoices have vanished. I'm not sure what happened but I really need this info.

Hi dundeecarpetclea When you are viewing the customer list is there any customers appearing? Is there a blue highlighted 'Clear Filter/View All' link next to the word 'Customers' in the top left of the screen, if there is can you select it please to see if your customers re=appear.

Its seems to only be happening in the App. When I log in through my laptop and open the desktop version all the details are there. 

Hi dundeecarpetclea We'd be grateful if you can troubleshoot the app to see if that resolves the issue, here's a link to help you.