She graduated from Havergal College in Toronto in 2001, and played for the Toronto Aeros. During the 2000–01 NWHL season, Apps played with the Beatrice Aeros and finished tied for fifth in league scoring with 42 points. In 2001–02, Apps was a member of the Beatrice Aeros and won the Ontario senior women's hockey championship.
At the first National Women's Under-18 Hockey Challenge in 2001 at Trois-Rivières, Quebec, Apps was the captain of the gold medal winning Ontario Red squad. She made Canada's national women's team only months later, as an 18-year-old.
As a freshman with the Dartmouth Big Green women's ice hockey program in 2002, Apps accumulated 22 goals, 13 assists and 35 points. Apps ranked fourth on the Big Green in scoring. She was on an All-Freshman line with Tiffany Hagge and Cherie Piper.
On October 21, 2012, Apps would score the game-winning goal in a 4-3 overtime win against the Toronto Furies. Said goal provided Florence Schelling with the first win of her CWHL career, which was also her CWHL debut.
On August 30, 2015 Apps completed the Muskoka Ironman triathlon in just under 15 hours. In September 2015 she retired from the Canadian women's team, after sitting out the 2014-2015 season from both the national team and her CWHL team, the Brampton Thunder. Apps finished her national team career with 50 goals and 50 assists for an even 100 points in 164 games, and ranks second all-time on the Canadian team in penalty minutes behind Hayley Wickenheiser with 255. She is involved with She Swings She Scores, a joint initiative between the Ontario Women's Hockey Association and the Golf Association of Ontario to encourage girls to take up golf as well as hockey.
She attended William Berczy Public School in Unionville, Ontario. Apps also participates in snowboarding, wakeboarding, golf, and soccer. She grew up playing girls hockey in the GTA. She attended Havergal College where she excelled as a female athlete. Prior to the 2010 Olympics, Apps worked at the Royal Bank of Canada in an Olympians program, where she was called upon to meet clients or give motivational speeches to employees. She is the granddaughter of Canadian professional ice hockey player for the Toronto Maple Leafs from 1936 to 1948, Hockey Hall of Fame member Syl Apps and the daughter of Canadian retired professional ice hockey centre who played 10 seasons in the National Hockey League for the New York Rangers, Los Angeles Kings and Pittsburgh PenguinsSyl Apps Jr.. Her brother, Syl Apps III was signed as a Free Agent by the Toronto Maple Leafs on July 22, 1999, although he never played a game with the Maple Leafs. Her sister, Amy was a member of the Canadian National women's soccer team and an OUA All Star in 1998 and 1999. Her cousin, rower Darren Barber, won a gold medal in coxed eights at the 1992 Summer Olympics in Barcelona as a member of the Canadian team. Barber also competed at the 1996 Summer Olympics in Atlanta, where he finished 4th. Apps's sister-in-law is Meaghan Sittler, whose father Darryl Sittler competed in the NHL. She is the aunt to a nephew named Sawyer. On April 17, 2012, Apps took part in the opening face off of the playoff game between the Ottawa Senators and the New York Rangers at ScotiaBank Place. On September 22, 2018, she married American women's hockey player Meghan Duggan.
