The Samaritans has suspended the Radar app it launched on 29 October, following concerns that were expressed about privacy.
The app scanned tweets for key words, and allowed users to monitor other people on Twitter for signs of mental distress or suicidal intent.
The app quickly attracted criticism from some people who had suffered from mental health challenges, who expressed concern about their privacy being breached.
In a statement this evening, the Samaritans said following the broad range of feedback and advice it had received since the launch of the app, including the serious concerns raised by some people with mental health conditions using Twitter, it had decided to suspend the application for further consideration.
"We care passionately about supporting vulnerable people in a range of ways, and know it is important we get Samaritans Radar right," it said in a statement.
"Our primary concern is for anyone who may be struggling to cope, including those with mental health conditions.
"We are very aware that the range of information and opinion, which is circulating about Samaritans Radar, has created concern and worry for some people and would like to apologise to anyone who has inadvertently been caused any distress. This was not our intention."
It said it would now use the time it has to engage in further dialogue with a range of partners, including in the mental health sector, to evaluate the feedback and get further input.
