Mark Scattalon says he knows what it's like to be "hangry" — feeling irritable or angry because you're hungry.

That's why he and fellow co-founder Fabian Raso are trying to help students avoid that sensation with their mobile app, Hangry.

The duo, who both grew up in Hamilton, are taking their invention before CBC's "Dragons' Den" in the Nov. 4 episode, set to air at 8 p.m.

Through the app, students can order and prepay for food from university and college campus eateries using their smartphones to avoid waiting in lines as they rush from class to class.

Scattalon said McMaster University has signed on with Hangry.

On Friday, he couldn't name three other post-secondary campuses that are on board because they hadn't yet agreed to publicize their involvement.

By September 2016, there could be as many as 30 universities and colleges with the app, Scattalon said.

While the app has been in development since 2012, the 28-year-olds refined their business model around the same time they pitched the project to the dragons in April. Originally, the app targeted restaurants, but that switched to on-campus eateries.

"The more we started talking to people, the more we realized … that was the real big opportunity," Raso said. "With the target market there, the fact that to my knowledge … there's no campuses in Canada right now doing it."

While they can't reveal much about their on-camera experience until the episode airs, Scattalon said the show was a different ball game from other pitch competitions they've been involved in, including Hamilton's Lions' Lair, where Hangry took fourth place in 2014.

"Dragons' Den" kicked off with a product pitch, followed by almost an hour of grilling from the dragons, Scattalon said.

"What you've got to do is really stand your ground," he said. "They were blowing fire, and we had to block it with our force."

Numbers aren't available yet for Hangry's on-campus food service users, but when the app was available with restaurants in 2014, 2,500 orders were placed, and there were 2,100 downloads with 1,000 active users, Scattalon said.