NAIROBI - Animated chatter spills out from a corner of tech giant Google's Nairobi offices as five Kenyan schoolgirls discuss their coming trip to California where they hope to win $15,000 (R195,000) for I-cut, an app to end Female Genital Mutilation (FGM).

The five teenagers, aged 15 to 17, are the only Africans selected to take part in this year's international Technovation competition, in which girls develop mobile apps to end problems in their communities.

"FGM is a big problem affecting girls worldwide and it is a problem we want to solve," Stacy Owino told the Thomson Reuters Foundation, while snacking on chocolate on a break from boarding school before flying to the United States on 6 August.

"This whole experience will change our lives. Whether we win or not, our perspective of the world and the possibilities it has will change for the better."

The five girls from Kenya's western city of Kisumu call themselves "The Restorers" because they want to "restore hope to hopeless girls", said Synthia Otieno, one of the team.

One in four Kenyan women and girls have undergone FGM, which involves the partial or total removal of the external genitalia, even though it is illegal in the East African nation.

Although the girls' Luo community does not practise FGM, they have friends who have been cut.

"We were very close but after she was cut she never came back to school," said Purity Achieng, describing a classmate who underwent FGM.

"She was among the smartest girls I knew."

I-cut connects girls at risk of FGM with rescue centres and gives legal and medical help to those who have been cut.

Its simple interface has five buttons - help, rescue, report, information on FGM, donate and feedback – offering users different services.

Kenya is one of the most technologically advanced countries in Africa, known for its pioneering mobile money transfer apps.

Technovation, which is sponsored by Google, Verizon and the United Nations, aims to teach girls the skills they need to become tech entrepreneurs and leaders.

"We just have to use this opportunity as a stepping stone to the next level," said schoolgirl Ivy Akinyi who plans to become a computer programmer.