Firstly there is Ozmo https://www.ozmo.io a drink bottle that measures your fluid intake. Seems like a good idea as it can connect to a variety of different other wearables but weighing in at $70 it’s not cheap (especially as I have a habit of leaving these things behind).
Next there is Heart-In http://heartin.net/heartin.html
Not a great website but looks interesting. Unfortunately, the product is not that different from lots of others and I can’t work out how it is differentiated.
Finally there is pulmaware by strados Labs. http://www.stradoslabsllc.com.
This one looks the most interesting and unique of the lot. The website is clear and the product something that most asthma patients will understand.
This one definitely gets my pick if the week and if I had lung disease I would strongly consider getting it.