They should also only share their profile link with specific people that they know.'Users can choose not to have their name or profile picture appear in the app's search or receive messages from unregistered users, but they must opt out to make this happen.
'If they don't, the name and photo they use to register will appear if other users search for them'. Earlier this year parents were warned about a 'suicide game' that was linked to the death of 130 teenagers in Russia.
One users have downloaded the app, they set up an account to start receiving messages.
The messages appear in a feed where they can be favourited, blocked and deleted without the sender knowing.
It features 24 hours of battery life and claims to be a 'mini-disco on the move'.
In mid-July, the buzzy new anonymous messaging app beat out mainstays like Snapchat and Facebook in the Apple App Store.
In Britain, a school in Essex had made parents aware of the game following talks with police.
The social media 'game' is being investigated by police in Russia in relation to dozens of teenage suicides, and now police in Britain are reaching out to schools.'But because all comments are anonymous, it's very easy for people to say mean and hurtful things without any repercussions.It's also added a tool to allow users to block accounts."We're taking this as a serious issue, and we're focused on [building] new features," he says.Users have no way of knowing who sent the message or how to reply to them.The app, created by developer Zain Alabdin Tawfiq from Saudi Arabia, has been top of Apple's App Store for weeks in dozens of countries including the UK after it was first released in June.Designed to let users send and receive honest feedback it is meant to help people discover their strengths and weaknesses.'Sarahah helps you in discovering your strengths and areas for improvement by receiving honest feedback from your employees and your friends in a private manner', the app description explains.