Parallel space is a very good app for those who use multiple accounts of Facebook Instagram etc . when it came to use more account at one device it sounds like completely impossible but we know there is something called parallel space which can completely separate your different account and easy to operate both account at one device .even though this is a very good app but it only let you to opporate two account in your phone . If we could use more than two account it would be more perfect and if it possible to to deincrease the capacity of taking space in memory then it can be very helpful.