So the startup idea is - to make website with the name like "sendtomyself.net". User opens this website on the computer, and opens this website on the phone. User writes into the text field on the site some text, and on the phone this text appers in this exact same input field. And user transfered text information via website from the computer -> to the smartphone.
To transfer some info using such startup would take seconds. By using other solutions it would take much longer. You will must register yourself, you will must install software into smartphone, etc. It could take a lot of minutes and effort.