Apps on my desktop had me repurchase

I have scrivener on both my phone and my ipad, and I cannot figure out how to log into the same account on my desktop- I need some help figuring out how to download it onto both my desktop and laptop. Thank you!!!

The desktop version is a separate product available for purchase from L&L web site or (I think) from the Apple macOS App store.

So that seems to be the case where it was a separate purchase- I am assuming there is a way to merge the two into one account? So I can go from my ipad or phone to my desktop or laptop?

Yes. Use Dropbox to sync. Full instructions in the Scrivener User Manual with more info on L&L’s support web page (FAQ section). Follow the instructions carefully.

Start here.

https://scrivener.tenderapp.com/help/kb/cloud-syncing/using-scrivener-with-cloud-sync-services