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.