A new app has been designed to help young people cut down their drinking.

'DrinkSmart', developed by Social Code Limited with support from ACC, measures the cost of drinking in dollars and calories consumed.

Social Code founder Siobhan Bulfin said the app helped people harness social networks to stay focused and healthy, set achievable goals and keep motivated.

ACC spokesman John Beaglehole said many young people knew they were overdoing it and would like to cut back.

"But there are so many triggers, such as people, places and particular activities, that can cause you to drink more than you want to."

ACC supported the app's development because, "the more you drink, the greater your risk of injury," Mr Beaglehole said.

"Overall, we estimate that alcohol contributes to 11 per cent of injuries."

Users click on icons to record details of the type, size, quantity and cost of the drinks they consume.

A personalised 'drink diary' then shows how many drinks have been consumed over the past week, as well as the cost and calories associated with them, Mr Beaglehole said.

DrinkSmart can be downloaded for free from iTunes, or an online version is available at www.drinksmart.co.nz.

- APNZ