As I read contributions from Adhish and Anne-Laure (inspiration posts below), I was reminded of micro-investment services such as Acorns.
Although Acorns is limited to mobile apps on iOS and Android as of now, it plans to also add a web interface.
When I think of investing (and I'm sure a lot of people feel this way as well), I thinking investing large sums of money into an investment portfolio reserved for those later in life with an established career (perhaps those that are 50+!). What I find interesting about Acorns is that it takes the concept of investing and scales it down to dollars and cents taken from everyday purchases. This makes investment seem friendlier and more inviting rather than feeling the need to invest thousands at once. The app even looks like it has a nice, clean, and easy-to-understand interface from the screenshots that are shown on the website.
I am not able to use the service due as an international student in the US but I find this concept interesting and wonder if it could help (albeit slowly) build knowledge of retirement savings or savings in general through investment.