In order to stay on keto, you need to lower your carb intake. It can be quite a strict diet especially when you are just getting started. Not everyone has an easy time reaching ketosis either. Thanks to the MetaNose, you can analyze your breath to see whether you are reaching your goal.
This gadget is pretty easy to use: simply exhale into it for 5 seconds and you will be able to analyze your data on your phone. Your Meta-Level score tells you what level of ketosis you are in. The device has a 1.23-inch display with a 300mA battery.