[saym]

They have an auto-deposit feature[0], but it doesn't purchase the stocks for you.

There is an unofficial api[1] you could use to cron-buy, though it's unofficial-ness means I don't officially endorse :)

[0] https://support.robinhood.com/hc/en-us/articles/206445496-Tr... [1] https://github.com/sanko/Robinhood