V2 KETOSCAN Mini Breath Ketone Meter - Portable Ketosis & Fat Metabolism Monitor for Keto Diet, Low Carb & Fitness Tracking | Perfect for Weight Loss, Ketogenic Lifestyle & Health Monitoring at Home or Gym

I've been on a Keto diet for about 1.5 years. I started just doing Intermittent Fasting and ended up in Ketosis, so I just went for it. But I realized that I needed some way to track my progress. Urine strips are useless. So I bought this device and have been satisfied with it now for just over a year. My wife is not on Keto so I'm not as strict on my macros as others and I no longer calorie count. The Ketoscan gives me a quick way to track my progress. Later into my journey I bought a Keto Mojo and added blood testing into my routine. I test with the Ketoscan every morning just before I end my fast. On Wednesdays and once on the weekend I add blood testing (beta-ketones and glucose) to get the glucose data point and to correlate to the Ketoscan. I find the blood tests generally track with the Ketoscan but there is variation. If my blood test shows I'm in high ketosis the Ketoscan will also show high, but there is not a direct mathematical relationship. They are measuring different things, so I would not expect them to be perfectly related to each other. But they let me know that I'm still on a good track. Based on this feedback I can often tell by listening to my body when I'm in a high level of ketosis.Some complain about the need to send it back after ~320 uses to have the sensor replaced. I consider that a good thing. Any device will go out of calibration over time, if you want an accurate result it will need periodic calibration. They seem to be pretty quick about it. Even my Keto Mojo includes calibration fluid so I can check its accuracy periodically.I do find the app a little annoying. It forces you to check off on a warning not to test 30 minutes after you eat. There is an option to not show this again, but it shows every time. After looking at this over 300 times I think I get it. Too many buttons to push and acknowledge to get a reading. I don't have any problem blowing at the proper rate, it is not that hard guys.The Keto Mojo app allows me to manually enter breath acetone into the database so I can see both blood and breath readings taken at the same time. But the Keto Mojo app does not properly represent the value to the level of ketosis. I wish the Ketoscan folks would work with Keto Mojo to get this right. It would be even better to have these two devices sync up automatically.I'll continue to use both devices to track my progress for the foreseeable future.