I personally do ALL of these apps and services. Some are better than others but it all comes down to what you're willing to do and your own personal goals. Comment below if you have any questions.
Day Trade, swing trade or inventing. There are many ways to get started today with as little as 5$
Use these to put some extra cash in your pocket. These are not meant to be a primary income, but can help add to the pot with very little effort.