Complaints rose 20 percent in January, according to data released by a city commission.
Complaints rose 7 percent in December, according to data released by a city commission.
The free app is designed to make it easier to register a complaint, its creator said.
The project includes $25 million to rehabilitate the Jefferson Park Transit Center, officials said.
The number of guns confiscated nationwide hit an all-time high in 2014.
Jim Sacluti, 38, of Sauganash, was arrested at O'Hare Airport in connection with a 2013 investigation.
Complaints rose in October, but dropped in November, according to data released Friday.
The racket caused by new runways has been deafening, Northwest Siders say.
This year was an eventful one for the Northwest Side neighborhoods.
"I'm glad we did it," Colleen Cichon-Mulcrone said. "But I'm angry that we had to do it."
The mayor and federal aviation officials must do more to address jet noise complaints, Quigley said.
The hotline, which has been deluged since a new runway opened, is unreliable, three congressmen said.
Three of the eight monitors announced in July by Mayor Rahm Emanuel will be installed in the suburbs.
The new runway opened in October 2013, prompting tens of thousands of complaints about jet noise.
Congress should allow more homes to qualify for subsidized soundproofing, Chicago voters said Tuesday.
Get our daily Chicago news and alerts!
Thank you for signing up!
Would you like to sign up for additional newsletters?
Thank you for signing up for additional newsletters.