The best social networking concept provided by great Mark Zuckerberg for connecting the people from all across the world through his invention of Facebook. I had been a user of this since last 5-6 years. My phone consists of 1 GB RAM and I used the Facebook mobile app for many years.
But during passes of time Facebook app kept on increasing its application memory by updates and when u start using it, now it has reached almost 150 MB when u start using it. It is very embarrassing as you cannot install much application when this app is available in your small RAM smartphone. Good but not suggested for people having less RAM smartphone.