Crypto Pi app disappears from Google Play Store

"I cannot download the app. I am worried all my mining efforts up until now would be thrown away," said Le Tu in the southern province of Dong Nai.

The Pi Network app, the main tool for users to "mine" the cryptocurrency by checking in every day, "is currently going through a regular review cycle and is unavailable to download through Google Play Store," the developers of the coin said on their website.

"We expect to be back up on the Play Store soon," they noted, adding users could manually download the app via a link.

There seems to be no issue with the app on App Store for Apple devices.

Bang, admin of a group of Pi users, also known as Pioneers, speculated that the project is set to transition to the main phase and was therefore temporarily removed from Google Play.

The app ranked seventh among downloads in Vietnam on Google Play Store last month.

Pi has become a controversial cryptocurrency as the developers allow anyone to own it by tapping on their smartphone once every day without any investment or much details about the development phase.

Some experts have said the project lack transparency and called on people to be careful to avoid being scammed.