Acorns is an automated app on your phone that make micro-investments everytime you makers a purchase. It works with a link to your credit card and a link to your bank.
The typical Acorns investment is a round up of your purchase to the nearest whole dollar. You can opt for multipliers if you so choose.
I have been using Acorns for years and it is a great way to stash some cash.
There are also investments for referring friends, which I am doing with you!
Clink the link and give it a try!