Thinking nasal strips for high RDI, low AHI? And Best nasal strips for sensitive skin? And how to measure RDI at home?

Hi!
Had Lofta results recently. My RDI is on the high end of mild (13), but my AHI is super low (0.2 per hour).

I also feel like my nose is always like a clogged up straw or something. So I'm thinking... maybe I'll try nasal strips!

1 - Any suggestions on a good nasal strip for someone who always tends to get rashes from patches, etc?

2 - I'd like to be able to measure if this helps (I don't snore, so I wouldn't be able to tell that way). Is there a way to do this WITHOUT buying an expensive Apple Watch? I have an iPhone.....?