bulk activity

I am looking for an app that I can do bulk interactions with. of course, it has proxy, user-agent etc support

ex: I have 10 accounts and want to comment on a specific post.

Does anyone know anyone who does this? I tried the monstersocial but it's terrible, it doesn't work and I lost my money.

You mean an app for mobile phone?
I doubt there is one.
Try finding maybe a free Windows version of it online