A. If you have investment accounts at many different places, and holding a lot of different stocks, funds, and bonds, it is a nightmare to manage them. Now a free service is available to tackle that task - Trakify.
What Trakify does seems trivial - allowing you to view all of your investment at one place, and alert you with any change. It is a reporting tool, not a trading tool (Robinhood is a free trading tool). This is not an easy task as it appears, given different investment companies' different reporting formats. Trakify even displays holdings by share lot and date of purchases, this is very useful information when deciding which share lots to sell.
Exitpoint.com is a competitor to Trakify, it offers broader services than Trakify, unfortunately you have to pay a monthly fee for its service.