Where is the best place to buy ?

I set up an account in both Robinhood and Coinbase, but I’m not sure where the best place to buy is. I don’t know who’s got the least fees for buying, selling, transferring, etc. I’d also like to get into regular stocks as well so Robin Hood seems nice. I’m not sure if I should have multiple apps or if i should try to keep everything in one for now while learning and starting out. Or if they’re all pretty comparable unless you’re moving a ton of money around in the future.