BACtrack C6 Keychain Breathalyzer | Professional-Grade Accuracy | Optional Wireless Smartphone Connectivity | Compatible w/ Apple iPhone, Google & Samsung Android Devices | Apple HealthKit Integration

Recently purchased my C 6 keychain breathalyzer and absolutely love it. I had already purchased the S80 breathalyzer 2 years ago and would give it 4 stars also. But when the C 6 came out I bought it due to it's small size, so easy to carry around when out on the town. I was a little worried that it might not be as accurate because it's so tiny. So I decided to compare it to my much more expensive S 80 breathalyzer. Each time I tested, I tested with both breathalyzers. And every single time, both readings came out exactly the same. I comfortable and confident using either one of my units.

This is surprisingly accurate for such a smaller and portable device. I have it on my keychain and it doesn't even make my keys feel too bulky or heavy. The build quality is really solid too, it does not feel like a cheap little product how most keychain electronics might feel. Works very quickly and gives you very accurate down to like 3 decimal points how much your blood alcohol content is. Great way to keep you and your loved ones safe! Also great conversation starter for me to bring it with to social events that I go to.

I use the breathalyzer as another tool to help stay sober. I found that by sending a daily snapshot to a family member was a good way to stay accountable. It sounds too simple to be helpful but it really has.Setup was simple. Small and portable. The app gives simple instructions on when to blow and then provides a screen detailing your reading and estimated time to become sober. I take a snapshot with my phone and send it via text to my folks.The "Professional Calibration" is not really necessary if for personal use. The accuracy has not degraded over the past year.PROS✅ Small and simple design✅ Durable✅ AccurateCONS❌ Requires "Professional Calibration" periodically

When I first received mine, I loved having it so I could have the peace of mind that I was safe to drive. However, over time (and not that long either - like a few months), it started to seem less accurate. At first I thought perhaps the drinks were weak at a particular bar and that explained why perhaps I blew a lower number than I thought I would. However, when I put it to the test while I was knowingly absolutely drunk, it showed a .01 reading. If you look deep in the instruction manual, the manufacturer suggests calibrating the unit every 6 months. Well, calibration cost $20 each time plus the hassle of having to ship it to them and wait 2-3 weeks for them to return it to you; only to have to repeat that every few months. Plus, since the calibration seems to slip a little with each use, it gives me no confidence whatsoever in the accuracy of the reading so my feeling is that it is more accurate and reliable to simply count drinks and stick to the one drink per hour rule, etc. If it did not require calibration or even if the calibration could be done easily by me at home, I would say this is a great product. However, I can not endorse it due to the need for such frequent calibration. Useless and could even be dangerous by giving people false low readings and making them think they are safe and legal to drive when they are actually not.

It isn't always perfectly accurate, but most of the time it is and it is really useful to see when people can't drive. My friends and I used it on the way back from skiing. Obviously we made sure to have one person stop drinking early and drink a ton of water: Me . But it is useful if someone else wants to drive and "says they are fine" and you want to double check.

This is an affordable and accurate device that helped me stay accountable. I ordered a cheaper device and it quit working after using it 2 times. I would highly recommend this discrete portable device.

I bought this for a friend that had been drinking too much. She's not the type to knowingly drink and drive. Honestly if I were drinking, Id get one for myself so I wouldn't be guessing as to whether I was okay to drive or not