three years ago to step up their game. >> how is what you're doing in 2016 different from what you did in 2012? >> we are 100 miles away from where we were in 2012. >> reporter: the biggest difference, activists use this phone app to get out the vote. >> it will show you their party affiliation, how reliable they are as a voter. their age, stuff like that. you just click that voter. do take survey and right there. >> reporter: it gives volunteers what is called dynamic scripting. prompting different pitches to voters depending on their answers. information all instantly sent back to rnc headquarters. >> we need to talk to republicans and make sure they know when the election is. >> reporter: now, in the final push thousands of staffers and volunteers are using that app in battleground states across the country. the rnc leading trump's ground operation says they will complete 17 million door knocks