The Health Service Executive (HSE) says people can now store their EU Digital COVID Certificate on the COVID Tracker App.
Hundreds of thousands of Irish people are now receiving their cert, ahead of the easing of rules around foreign travel next week.
Many have already received it via e-mail, while others can expect their cert in the post by next Tuesday.
The documents are aimed at facilitating the safe return to travel within the EU, with the Irish rules easing from July 19th.
While a new feature has been released on the COVID Tracker App that allows people to carry their COVID cert securely on their phone.
You can access this by downloading an update and following the instructions in the app to scan the QR code on your certificate.
The HSE says the certificate is only stored on your phone, and is not shared with anyone.
Users can also delete it at any time.
Health Minister Stephen Donnelly says: "The COVID-19 pandemic has shown us the very best of our health service.
"The commitment to innovation and creative solutions shown in a crisis has been above and beyond.
"The COVID Tracker App is part of that spirit of innovation.
"I am very proud of the work of the HSE and Department of Health in enhancing the app's functionality.
"From today, users can now safely and securely store their EU Digital COVID Certificate on the COVID Tracker App.
"This is a great development, and one that will support the continued re-opening of our society."