This is a brokerage/stock app that is similar to Robinhood and others. Not sure if it is available for people outside the US though.
If you are into stocks or just want to get a few stock shares for free, they have a terrific promotion.
Sign up for a WeBull account for one free stock. You get another free stock with a deposit of any amount, like $1.
They are constantly updating their referral program. Currently, you get a minimum of two free stocks to a maximum of four free stocks.