Despite the widespread economic pain the pandemic has inflicted across the country, the U.S. stock market indices posted record highs lately, making many investors quite a bit richer. There are real opportunities to build wealth by investing today and you don’t have to miss out. Financial firms have made it easier than ever to invest with smartphone apps that can get you started with just a few dollars. If you’re new to investing, it’s understandable if you’re not sure which app-based investing platforms are reputable, which ones fit your investing needs, and what the investing requirements of each are. Here’s a quick guide to three of the most reputable app-based brokerage services (as reviewed by Bankrate , NerdWallet , and Forbes ) on the market today: Acorns When you sign up for this app and link a credit or debit card to it, Acorns will round up your purchases to the nearest dollar and invest your spare change, if you’d like. You can also make recurring contributions for as...