Security firms have repeated warnings that unofficial versions of Pokemon Go are likely tainted with spyware or trojans.
RiskIQ has found more than 215 unofficial versions of the app in more than 21 app stores.
Separately security researchers at security software firm ESET warn that the first ever fake lockscreen app on the Google Play Android Store and two scareware apps all posed as Pokemon Go-related apps.
The lockscreen app deliberately locks the screen right after the app is started forcing the user to restart the device. "After reboot, it runs in the background hidden from the victim, silently clicking on porn ads online," ESET reports.
"Pokemon GO Ultimate" - the lockscreen app - and scareware apps "Guide & Cheats for Pokemon Go" and "Install Pokemongo" are no longer available on Google Play. Each was quickly banned. Nonetheless the concern remains that cybercrooks are more than likely to try similar tricks on Google Play and elsewhere - so discretion is advised.
The widely popular augmented reality game was unleashed on the UK market on 14 July, following the US launch of Pokemon Go on 11 July. ®