I was using shareit from a long time it is very popular app and it had a good user interface but now shareit is filled with a lot of advertisement. You can find ads and annoying videos within this app. These ads are everywhere in the app.
The main function of this app is to send files but now it seems that they want their users to see only ads. Its seems like sending and receiving files is now secondary function of the app and the only thing they want is to show annoying ads and videos to their customers.