The HSE has confirmed that close contact alerts on the COVID Tracker app were delayed on some Apple devices.
It comes after an issue discovered by Newstalk was brought to the HSE's attention.
An iPhone user went to 'Settings > Exposure Notifications' on his iPhone 8 and found a message, which read ‘Your exposure log has not been checked in 14 days'.
Jess Kelly took Kieran though the issue and how to check if your phone was affected.