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Enterprise Dunedin director John Christie said this week a few hundred licences had been bought for businesses to use, and the app was a free way for contact tracing to happen.
Once registered, businesses printed a QR code on a poster to display at the entrance to their premises, and those with the Rippl app on their phone - free for individuals - could scan the QR code when entering and leaving, Mr Christie said.
The app, created by Wellington software developer Paperkite, recorded where and when a person scanned in or out of a location.
‘‘We’re trying to make it easier for businesses; we know it’s a tough time.
‘‘Moving into Thursday, we were conscious of the need to get this out quickly - we want them to be up and trading. This helps with that.”
Interested businesses can contact the city council and individuals can download the free app.