All the apps claim to provide a form of entertainment.
They include games, a music downloader and smartphone wallpapers.
The apps contain malware called HiddenAds.
It’s adware that bombards your phone with adverts and can drain your battery.
The apps to watch out for
Here’s the apps we’re being warned to delete
Shock My Friends – Satuna
ThemeZone – Live Wallpapers
shock my friend tap roulette v
ThemeZone – Shawky App Free – Shock My Friends
Tap Roulete ++Shock my Friend
Ultimate Music Downloader – Free Download Music
Sometimes too many adverts can even stop a phone from working properly.
Some of the apps have been promoted on Instagram and TikTok.
A child spotted one of the adverts and alerted cyber researchers at Avast.
Jakub Vavra, threat analyst at Avast, said: “We thank the young girl who reported the TikTok profile to us, her awareness and responsible action is the kind of commitment we should all show to make the cyberworld a safer place.
“The apps we discovered are scams and violate both Google’s and Apple’s app policies by either making misleading claims around app functionalities, or serving ads outside of the app and hiding the original app icon soon after the app is installed.
“It is particularly concerning that the apps are being promoted on social media platforms popular among younger kids, who may not recognise some of the red flags surrounding the apps and therefore may fall for them.”
The researchers have told Google and Apple about the apps and warned about the TikTok and Instagram promotional profiles.
Avast want parents to be aware that young people using TikTok might fall for the scam apps.
Vavra added: “It’s also important for parents to speak to their children about apps and what to look out for before downloading an app, or make it a rule for children to ask for permission before allowing them to download an app, to avoid potential unnecessary costs.”