Not as bad as I thought!!
Ok so my 11 year old has been bugging me for this app, all her friends have it. So I started reading the parent reviews and immediately said NO WAY. Adult material, adults posing as kids etc etc, why would I put my child at risk!! It was not until I read a review on the kids side that said I wish my parents would download it and see for themselves, which I thought was a very valid point, so I did. I created an account, made sure location service was off and made it a private account, I did not add a picture and did not give my real name just a username. You can post music to your own account or post it publically. I then down loaded it on daughter's phone. I got her to search for me and she tried to message me from her phone but as mine was a private acc It would not let her contact me as a non friend, which was good. When we became friends on the account, she could view what I posted to my own account but it would not let her share it either on musical.ly or instagram as it was a private acc. Anyone can ask you to be their friend, you get an accept or decline option. Obviously if you post anything publically anyone can comment or share. I have a sensible 11 year old so the rule is she can post to her account not publically, she can only friend those she definitely knows are her friends. The profile stays private.
In regards to the music, yes there are songs with swearing, but there are plenty of songs that are not. Yes she may listen to them to check and she will hear swearing but she knows not to sing to those. In regard to the #, some people say if you keep clicking on hashtags you will eventually get to some adult content. I tried and unless doing something wrong I could not find anything!!! So the rule again is not to go clicking around which again she is not bothered about. We talk openly about internet security, grooming etc etc so she will talk to me if any issues, hence why I think this is appropriate for age 10 presuming they are savvy with internet usage.