Question about Google Spreadsheet integration

Would i have to continually export the current spreadsheet to the Google Spreadsheet Integration?  or is it something I set up once somewhere so that the results are always viewable that way?  Not really following from the link what I'd be doing to accomplish this.

Could I open the sheet it created with Excel on my phone would i HAVE to have yet another app to see it that way?

You only need to integrate the form with google spreadsheet once. After the setup, all the new submissions of that form will appear in the google spreadsheet that you have setup. If you have the Google Sheets app in your android, then you can easily view the spreadsheet of the submissions on the app. If not, then you can simply download the file and view it on the Excel on your phone instead.

Here's a guide on how you can setup the Google Spreadsheet Integration: How to Integrate Form with Google Spreadsheet

Do let us know if you need further assistance.