The app with the potential to save lives was created by Luke Benson, Donnchadh Barry and Paul McDonagh, 5th year students at the Castlebar college.
The app detects when a person with an underlying illness collapses, and then contacts emergency services and tells passersby how they can help.
You can view a video of how the app works at the end of this article.
Three other Mayo entries were Highly Commended:
St Joseph's Secondary School, Charlestown
An Investigation Into The Posturing Behaviour Of Farrowing Sows And The Interactions of Sows With Their Piglets.
Biological and Ecological, Junior
Student: Rebecca McDonnell
Rice College, Westport
Response In Native Fish To Environmental Stress.
Biological and Ecological, Intermediate
Students: James Poole, John Hewer
Overall, Mayo was very well represented at this year BT Young Scientist Exchibition with two schools Colaiste Chomain, Rossport, and St Joseph's Secondary School, Charlestown, have multiple entries.
Students, teachers and parents can be very proud of the high standard of projects exhibited by secondary schools from Mayo.
The following were the other secondary schools from County Mayo that exhibited at the 2012 BT Young Scientist and Technology Exhibition:
Davitt College, Castlebar
Similarities of the Irish Famine (1845-1852) and East Africa Famine (20 July, 2011-present).
Social and Behavioural Sciences, Intermediate
Students: Michelle Tolan, Eleanor Arrowsmith, Hannah Sweeney
St Joseph's Secondary School, Charlestown
Advertising: What works?
Social and Behavioural Sciences, Intermediate
Students: Cailín Durkan, Michaela Leonard, Aileen Casey
St Joseph's Secondary School, Charlestown
Financial Maths: Interactive Learning Versus Traditional Classroom Learning: You Be The Judge!
Social and Behavioural Sciences, Intermediate St Joseph's Secondary School.
Students: Jacqueline Brennan, Hannah Duffy, Katie McDonnell
Colaiste Chomain, Rossport
Chemical, Physical & Mathematical Sciences, Senior
Colaiste Chomain
Student: Deirbhíle Ní Ghearbháin
Colaiste Chomain, Rossport
"Prátaí Plaisteach" fiosrú ar láidreacht an bith-phláisteach déanta ó stáirse prátaí.
Chemical, Physical & Mathematical Sciences, Junior
Students: Séamus Muirithe, Keith Naughton
Colaiste Chomain, Rossport
'Bainne Greamannach' Iniuchnú Ar Cé chomh Eifeachtach Atá Gliú Déanta ó Bhainne.
Chemical, Physical & Mathematical Sciences, Intermediate
Students: Tracey Ní Mhóráin, Shauna Ní Sheibhleáin
Davitt College, Castlebar
The Effect Of Caffeine On The Rate of Seed Germination.
Biological and Ecological, Intermediate
Students: Fintan Murphy, Keith Mulchrone, Shane Nugent
Rice College, Westport
Response In Native Fish To Environmental Stress.
Biological and Ecological, Intermediate
Students: James Poole, John Hewer
St Muredach's College, Ballina
A Quantitative Study Of The Sand Organisms That Link The Food Chain In The River Moy.
Biological and Ecological, Senior
Students: Rory Upton, Cillian Upton, Brian Lavelle