The HSE spent more than €1.2 million on the COVID Tracker app, new figures released to Newstalk under the Freedom of Information Act show.
€811,000 was spent to develop the app before it launched on July 7th of last year.
There's been a further €522,000 spent in terms of operating costs since its launch - including the likes of testing, support and maintenance.
Ireland received €150,000 in funding from the EU for the project, meaning the total cost of the COVID Tracker app to date is €1.36 million.
Looking at the cost of apps developed by other countries around the world, the costs vary dramatically - figures go from around €2.6 million right up to around £35 million.
Speaking about the cost of the app, Newstalk's technology correspondent Jess Kelly told Newstalk Breakfast: "When you compare [the app spend] to how much other countries spend, that is not ridiculous.
"But it does push the conversation into did we get value for money - how much impact did this app have?"
The FOI figures also show how much investment was made by the HSE into ICT since the beginning of the pandemic, from March of last year to March of this year.
€1.88 million excluding VAT was spent updating infrastructure, serves, storage, working from home and end of life infrastructure.
HSE CEO Paul Reid has said there will be a significant investment in ICT now needed to replace devices and servers impacted by last month's cyber attack.