A Personal Account can be used to test out Tube Toolbox. If you download Tube Toolbox and log in before purchasing, you are creating a Personal account. The limits in place on Personal Tube Toolbox Accounts should give you a taste of what Tube Toolbox is about. With a Personal account, you can send 5 Comments, Messages and Friend Requests within a 24-hour period before it stops you and tells you to upgrade to a paid Professional Account.