Are you also one of those 18 Million users using SARAHAH?A new app is causing concern among parents and child protection charities, amid warnings that it provides a platform for cyber bullying.Sarahah - meaning \u201chonesty\u201d in Arabic - encourages anonymous \u201cconstructive comments\u201d when you register and share your link on social media.You can also comment anonymously on your friends if you know their link. Sarahah is immensely popular throughout the middle east.It was written by a Saudi programmer, Zain al-Abidin Tawfiq.It\u2019s now becoming a phenomenon in the UK and in the United States where it reached Number 1 in the Apple download charts in early August.But fears that vulnerable teenagers at risk from bullying and suicide are concerning parents and children\u2019s organisations.Similar apps have been and gone. A teenager was found hanged earlier this year after allegedly being bullied on a similar app called Sayat.Me, which was shut down in May.The App Store has reviews suggesting that Sarahah is being used for cyber bullying.What is Sarahah?Users sign up for Sarahah either on the website or by downloading the app on Android or iOS. They are provided with a link to share on social media.Anyone who clicks the link can provide anonymous comments of ANY KIND. Although the app does ask you to "Leave a constructive message :)"Users can even add a photo to their profile.Lots of Sarahah users are even sharing the anonymous feedback on their Facebook pages.\u201cUsers can choose not to have their name or profile picture appear in the app\u2019s search or receive messages from unregistered users, but they must opt out to make this happen. If they don\u2019t, the name and photo they use to register will appear if other users search for them\u201d. The organisation warned in the Huffington Post.How to stay safe using Sarahah.The NSPCC has released guidelines to help you keep your child safe whilst using Sarahah:Talk to your child regularly about what they are doing on Sarahah. Let them know they can come to you or another trusted adult if they\u2019re feeling worried or upset by anything they have seen.Explore the site with your child. Understand why they like using Sarahah and make sure they know what they can do to keep themselves safe.Agree rules about what\u2019s okay and what isn\u2019t when using sites, apps and games. You can use our Family Agreement template to help you get started.Manage your technology and use the settings available to keep your child safe.An NSPCC spokesperson said: \u201cApps that allow anonymous comments can be worrying as they could potentially be misused by online bullies to send abusive or upsetting messages.We\u2019d encourage children using Sarahah not to share their username publicly to limit who can communicate with them on the app.\u201cOur advice for parents is to talk to your child regularly about what they are doing on apps like Sarahah and encourage them to speak to you if they see something upsetting.Any parent who wants advice on keeping children safe online can contact the NSPCC and O2 helpline on 0808 800 5002.\u201dHowever, you can still use Sarahah by blocking the app from accessing your contacts, without risking your contacts to be uploaded to its servers.Since newer Android operating systems (starting with Android 6.0 Marshmallow) do allow users to limit permissions for apps, users can limit permissions so that apps do not gain access to contacts or other information that doesn't have anything to do with the app's functioning.To do so, Go to Settings \u2192 Personal \u2192 Apps, now under Configuration App, open App permission and limit permission of apps you like.