DCA Tools (Roundup, autopayments, etc)

Which dollar cost averaging tools do ya'll reccomend. I heard of RoundlyX a lot but they recently shut down. Every single one from this https://www.reddit.com/r/Bitcoin/comments/cgo4l1/which_roundup_appsite_do_yall_use/ post from years ago has a faulty connection to their site so I can only assume they're shit.

I'm interested in Roundup right now - a friend uses Acorns but I'm not a fan of how they don't crypto only an etf for it. Also, if anyone knows why are these companies seemingly doing so bad lol.