I'm not sure if this was already suggested (If it was before I'm sorry, I spend no time on the forum)...
But, I think you should be able to party on m.roblox.com
I have no idea what the app can do, but I can' t get if because I have to apple devices.
Anyways, I get on ROBLOX using my Kindle sometimes. I wish I could party on the mobile site because it'd be easier to me.
Thank you for reading if you did.
- Rilye