Why do I get challenged on my mobile?

Question

I have gotten about a dozen challenges from a certain user on Sololearn to my mobile account by the username "Sololearn", is this a default username for other people or is this someone pretending to be admin or something?
PS Why don't I see the challenges from PC? (i'm definetely using 1 account here and there)

Answer 1

The challenges can be only played in the app – not on the web. The sololearn account is sololearn's bot that challenges users.

Answer 2

You can turn off challenges for each language in your apps settings if you don't wish to do them currently.

Answer 3

Thank you, Lisa, for answering my question.