The app is linked to every defibrillator in the world and Mr Allingham says everybody should get it on their phone, especially in Wairarapa - with its ageing population.
"For those with angina, when it kicks in it's comforting just to look at it and know where the closest one is to you."
According to St John, using a defibrillator can increase the chance of survival by up to 40 per cent - dialling 111 and performing CPR is not always enough to prevent death.
Mr Allingham had to get a pacemaker fitted when he was 37 after his heart kept stopping.
"To start with it was just enough to give me a strange feeling of dread and trepidation, then enough for me to pass out."
He has also had stents put in, which support the artery walls. Throughout his ordeal he has learned CPR is only likely to be effective if started within six minutes after blood flow stops.
"One of the biggest things I learnt was bystander conventional CPR is around 8 per cent or less survival."
He said in cities with public defibrillators the survival rate for a person in cardiac arrest can be 48 to 74 per cent if a bystander gives CPR and shocks a person within three to five minutes.
"A victim's chances of survival are reduced by 7 to 10 per cent for every minute of delay until defibrillation."
Mr Allingham said his family has seen him dead a couple of times.
"It's strange to know your wife and kids have already seen you dead."
He described coming back to life like opening and closing your eyes for a just a second and finding that everything is in a different place.
"I've been dead for a while, it's very disturbing.
"It's like you've just had a time warp."
Mr Allingham said people shouldn't wait to find out if they're having a heart attack.
"Don't be scared to use it [the defibrillator]. If you aren't having a heart attack, it won't activate."
Mr Allingham said he has "quite a different view on life having died quite a few times".
"It makes you appreciate Christmas; and your children."
"At the end of the day we want to be here for our kids."
