Michele Elliott, director of children's charity Kidscape, said: "PingAlert provides a great tool in the war against bullying. Now kids can alert their parents that they're in trouble without having to call or text them."
The service can be accessed online and costs the sender's phone 50p per PingAlert, plus the cost of the call, which takes three to five seconds.
Downloads and Drivers
From the Forums
Subscribe to TechSpot
Get free exclusive content, learn about new features and breaking tech news.