Pick your brains pls

[lintu]

can anyone recall a gadget that helped track your bbt I noticed it a few yrs back when ttcc dd? it was something that you wore that you could download to software on your pc? cant for the life of me think what it was called, it was ££ but thinking cheaper than IVF

 

[x-ginge-x]

https://www.duofertility.com/ was it this?

 

[lintu]

That's it fab thanx