4.2
999 reviews
Content rating
Everyone
100K+
Downloads
Content rating
Everyone
Learn more
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About this app

Easily estimate your BAC (Blood Alcohol Content) with a BACtrack smartphone breathalyzer and this free companion app. Designed by BACtrack, the leading manufacturer of personal and professional breathalyzers, this app connects to your device wirelessly via Bluetooth®, and allows you to measure your alcohol level with the award-winning BACtrack Mobile, BACtrack C6, and BACtrack C8 smart breathalyzers.

BACtrack makes it easy to understand how alcohol affects the body, empowering you to make smarter, more informed decisions. In this version of the BACtrack app:

• Pairing is automatic once you turn on your BACtrack and open the app; results are communicated via Bluetooth® to display on your phone.
• Quickly and easily estimate your BAC and read safety information about corresponding impairment levels.
• ZeroLine® estimates when your BAC will return to 0.00%.
• Saved BAC readings allow you to get a clear picture of your drinking habits.

The most trusted brand of breathalyzers on the market, BACtrack has been featured in Fast Company, CNET, and Bloomberg. BACtrack was rated #1 Breathalyzer by Car and Driver Magazine, and has won top awards from Popular Science, Good Design Australia and the Edison Awards. Download now and test your BAC anywhere, anytime!

BACtrack was the first company to ever receive FDA clearance to sell breathalyzers to consumers for personal use. Using a personal breathalyzer is a great way to enjoy yourself responsibly. As with anything health related, you should seek advice from your doctor or other qualified health professional before changing habits.
Updated on
Apr 15, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location, Photos and videos, and Device or other IDs
This app may collect these data types
Personal info, Health and fitness and 2 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.2
973 reviews
Eric Carter
May 1, 2026
updated review: they fixed the app somewhat. you still have to have an account, but using the app is back to being easy and smooth again. human civilization survived millennia without accounts and passwords. i want functionality and simplicity. and they had that before. especially if I'm using this as a party trick to see everyone's BAC... then I don't need a lot of data points saved on my account
1 person found this review helpful
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KHN Solutions, LLC.
April 24, 2026
We're so sorry you've been experiencing this — and we want you to know it's been on our radar. We're happy to say that our latest update includes a fix for this exact issue. Please update the app from the [App Store / Google Play] and let us know if that sorts things out.
Jon B
February 9, 2026
No help from support. I work in IT and gave specific error messages and multiple things I tried and cannot register or login. They told me to register on the app, in response...which, as I stated to them in the first place, is failing. Haha. What a joke. I didn't have this problem a year ago, or even 4 years ago, until they changed their whole system.
3 people found this review helpful
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KHN Solutions, LLC.
April 24, 2026
We're really sorry to hear you are still experiencing an issue — that's the last thing we want. We'd love to look into this more closely, but to do that we could use a little more detail from you. You can contact us at support@bactrack.com so we can get this looked at as quickly as we can.
Jai Antone
February 1, 2026
I don't understand. I have been able to use the device without an app, my preferred method. Suddenly it would want to connect to an app. I downloaded the app, made an account. Sometime later, it wants the app again. I don't remember the account info after so long not using the device. I prefer just using the device, without a connection to an app account. I had to make (another) account to use the device (not my personal preferred method). Not at all accurate. Used again, not accurate again.
4 people found this review helpful
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KHN Solutions, LLC.
April 24, 2026
Thank you for sharing your thoughts. We understand this change feels like an extra step you didn't ask for. We also want to be clear about your data: creating an account doesn't mean you have to store your readings and you can choose whether your data is saved. If you are having account issues, please email us at support@backtrack.com.

What’s new

Welcome to the all new BACtrack! This update brings a full redesign with improvements in speed, performance, and design.