How many Rails apps can i host?

Hi all,

I have the shared plan. How many Rails apps can i host on my account?
Also, i heard that each app cannot take more than 200mb in memory or else it’s killed. Is it still correct?

Let’s say i host 10 rails apps that each takes like, 180 mb of ram, i guess someone will tell me to slow down my development a bit (or upgrade to PS)?

Thanks in advance!