Used this in my aircraft and it works well. The pulse ox itself Id give 5 stars. The app on the other hand needs a little work but should get there. As for the apps features, the history graph page seems useless. You cant navigate around to see the data from my flight later the next day. It just doesnt seem user friendly. It would also be cool if it logged the data with your altitude for reference wether hiking, flying or what ever your doing at high elevation.
I e-mailed the data to myself and you can view it that way but its not in a nice graph form and just the data. For trending seeing the graphs would be better especially if altitude was graphed with it.
Gassermd1995 about Masimo Personal Health