86,000 users of the Covid Tracker App have deleted it from their phones since its launch.
The number represents roughly one in ten people with Android phones who had installed the technology.
It comes as a new fix for the app's being worked on by Google, following complaints at the weekend it drains batteries.
The App was developed by a Tramore-based software company called NearForm.
It reached 1.3 million downloads in its first week, roughly 37% of people in Ireland over 16 years old, making it the most successfully-adopted contact tracing app launch in the world.
Nearform, who developed the app for the Health Service Executive, confirmed that it is working with public health authorities in Pennsylvania to utilise the app.
Covid Tracker Ireland has already begun picking up its first cases, with the HSE confirming last month that it had picked up contacts that manual tracing had not.
Nearform is also working with Northern Ireland’s public health authorities to launch the contact tracing app there, ensuring cross-Border compatibility for the system. The company has also developed the app used in Gibraltar.
