Best Overall
BACTrack C8

A great breathalyzer with extensive features.

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Quickest Results
Rofeer Digital

Provides fast results without sacrificing accuracy.

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Best Professional-Grade
BACTrack Trace

A breathalyzer with police-grade accuracy.

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Most Portable
BACTrack C6

A lightweight and compact breathalyzer.

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Most Durable
BACTrack S80

A breathalyzer that can go nearly anywhere.

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Getting accurate readings on your blood alcohol content, or BAC, can mean the difference between a safe drive home and a DUI. Personal breathalyzers can tell you when you’ve passed the legal limit so you can avoid driving impaired.

For your convenience, our review team has reviewed and tested the best breathalyzers on the market. We break down their accuracy, speed, and ease of use so you can get the most accurate test results when you need them most.

5 Best Breathalyzers

Five of the best breathalyzers as reviewed and tested by our auto team.

  1. Best Overall: BACTrack C8
  2. Quickest Results: Rofeer Digital
  3. Best Professional-Grade: BACTrack Trace
  4. Best Portability: BACTrack C6
  5. Most Durable: BACTrack S80

#1 Best Overall: BACTrack C8

The BacTrack C8 is one of our picks for best breathalyzers.

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Our review team’s choice for the Best Overall breathalyzer is the BACTrack C8. Using BACTrack’s patented BluFire Fuel Cell Sensor, this breathalyzer delivers quick results without sacrificing high accuracy.

Another notable feature of the C8 is BACTrack’s ZeroLine technology. This provides the amount of time it takes to reach a BAC of 0.00 percent based on a single reading. If using the C8 with the BACTrack app, users can even call for an Uber if their alcohol level is above the legal limit to drive.

Pros Accurate fuel cell sensor Fast readings Pairs with BACTrack app
Cons Short battery life

Key Features

  • Cost: Around $90
  • Weight: 2.0 ounces
  • LCD screen
  • Optional wireless connectivity

What’s In the Box?

  • BACTrack C8 breathalyzer
  • Mouthpieces (3)
  • Instructional manual
  • One-year warranty

Our Experience

After blowing into the C8, our review team was able to get a reading within less than ten seconds. The C8 gave a reading all the way down to a thousandth of a milligram of alcohol.

Not only was the LCD display on the C8 device bright and clearly legible, but we also loved the BACTrack app’s interface. The Bluetooth connection remained stable even with other devices attached, too.

Overall Rating5 out of 5
Speed5
Accuracy5
Interface5

What Customers Are Saying

Amazon Review Score: 4.5 out of 5 based on over 1,900 reviews

The most notable feature of the C8 that customers like is its portability. Many reviewers are also quick to commend how quickly it provides a reading. Some customers claim the C8 died after a few uses, even right after fresh AAA batteries had been installed.

#2 Quickest Results: Rofeer Digital

The Roofer Digital is one of our picks for best breathalyzers.

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If you’re looking for accurate results in a pinch, the Rofeer Digital breathalyzer can deliver. Its 15-second warmup time beats most breathalyzers, plus findings can be delivered in as little as a few seconds. The LCD screen will even change colors to indicate a safe, moderate, or unsafe BAC level.

The Rofeer Digital breathalyzer will automatically turn off after 15 seconds, when not in use, to conserve energy. Aside from measuring BAC up to the thousandth, this breathalyzer can be switched between up to six different units of measurement to ensure the best results.

Pros Multiple units of measurement Automatic power-save mode
Cons Screen fogs easily

Key Features

  • Cost: Around $40
  • Weight: 3.0 oz.
  • Up to six measurement units
  • Color-changing display
  • Portable size

What’s In the Box?

  • Rofeer Digital breathalyzer
  • Mouthpieces (5)
  • Instruction manual
  • Black cloth carrying bag

Our Experience

When using the Rofeer Digital breathalyzer, our review team was able to obtain results very quickly. The interface was easy to use and even gave us the appropriate color badge to indicate their BAC.

Despite giving speedy readings, one thing that concerned us was the Rofeer Digital’s accuracy when used repeatedly in a short period of time. We blew two tests after waiting for a couple of minutes and received a higher score than the initial test.

Overall Rating4.8 out of 5
Speed5
Accuracy4.5
Interface5

What Customers Are Saying

Amazon Review Score: 3.9 out of 5 based on over 3,000 reviews

Most of the top reviews express satisfaction with the accuracy of their Rofeer Digital breathalyzers. One tip that a few customers share for better results is to rinse your mouth with water before blowing for a clear result. Negative reviews claim the LCD screen fogs after a few uses.

#3 Best Professional-Grade: BACTrack Trace

The BacTrack Trace is one of our picks for best breathalyzers.

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Approved by both the Department Of Transportation (DOT) and National Highway Traffic Safety Administration (NHTSA), the BACTrack Trace rivals most breathalyzers used by law enforcement officials. It’s listed by the FDA as a medical device due to its Xtend Fuel Cell Sensor technology that provides professional-grade accuracy within a 0.005 BAC percentage.

The BAC Trace uses a simple, one-button operation that makes finding a reading easy. This gadget also has flashback memory that saves the device’s last 10 BAC readings for future reference.

Pros Accurate within 0.005 percent Flashback memory
Cons Poor durability

Key Features

  • Cost: Around $100
  • Weight: 3.0 oz
  • Xtend Fuel Cell Sensor
  • DOT, NHTSA, and FDA-approved
  • LCD display

What’s In the Box?

  • BACTrack Trace breathalyzer
  • Carrying case
  • Mouthpieces (6)
  • AA batteries (2)
  • Instruction manual
  • One-year warranty

Our Experience

Based on a few readings from the BACTrack trace, our review team found it consistently provided accurate results. We especially appreciated being able to view past test results to see how much our testing member’s BAC changed over time.

We had to wait longer than expected to get our results. Each reading took anywhere from 20 to 30 seconds to process, which was already after waiting more than 3 minutes between blows. The interface was simplistic and did not provide anything more than the readings themselves.

Overall Rating4.7 out of 5
Speed4.5
Accuracy5
Interface4.5

What Customers Are Saying

Amazon Review Score: 4.5 out of 5 based on over 1,300 reviews

Customers like that this device brings them peace of mind when drinking thanks to its consistent accuracy. They also say they like how long its battery life lasts. Some reviewers claim this device isn’t as accurate as advertised and that its durability is limited.

#4 Most Portable: BACTrack C6

The BacTrack C6 is one of our picks for best breathalyzers.

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The BACTrack C6 keychain breathalyzer is roughly the size of a 9V battery but can deliver accurate BAC readings just as well as its larger counterparts. Powered by BACTrack’s BluFire Fuel Cell Sensor, the C6 stays accurate after multiple uses and can fit on your key ring with ease.

Using ZeroLine technology, the C6 is able to estimate how long until your BAC reaches zero. It has optional wireless connectivity to Apple, Samsung, and Google smartphones. Those who use the BACTrack app can even call an Uber from the app itself if they’ve had too much to drink.

Pros Accurate after multiple uses Pairs with smart devices
Cons Mouthpiece difficult to remove

Key Features

  • Cost: Around $70
  • Weight: 2.0 oz.
  • Optional wireless connectivity
  • Keychain mount

What’s In the Box?

  • BACTrack C6 keychain breathalyzer
  • Mouthpieces (3)
  • AAA battery
  • Instruction manual
  • One-year warranty

Our Experience

The best feature of this breathalyzer is its size, as it easily fits on a keychain and isn’t problematic to carry around. We also liked that the mouthpiece fits snugly on the device so we didn’t have to worry about it coming loose in our pockets.

Results were provided in a timely manner when we blew into the device. It took more time than the C8 did to display on the app, though. It was consistent with its accuracy but blew about 0.01 percent higher than anticipated.

Overall Rating4.5 out of 5
Speed4
Accuracy4.5
Interface5

What Customers Are Saying

Amazon Review Score: 4.4 out of 5 based on over 4,500 reviews

A good deal of customers are impressed with how well this breathalyzer works given its small size. There are even some reviews from retired police officers who compare this to their state-issued breathalyzers and claim the C6 holds up well. One frequent complaint is that its mouthpieces are difficult to remove.

#5 Most Durable: BACTrack S80

The BacTrack S80 is one of our picks for best breathalyzers.

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Thanks to its Xtend Fuel Cell Sensor, the BACTrack S80 can accurately produce thousands of test results before requiring recalibration. Its sensor module doesn’t produce false positives that can mislead users and has reliable longevity.

The S80 has advanced features such as continuous temperature checking and an internal pump system for breath capture. Its simplistic one-button interface allows users to press and blow to receive a reading in as little as 15 seconds.

Pros Quick warmup time Continuous temperature testing One-button interface
Cons Requires recalibration more frequently than expected

Key Features

  • Cost: Around $130
  • Weight: 4.8 oz.
  • Xtend Fuel Cell Sensor
  • Accuracy up to a thousandth of a percent

What’s In the Box?

  • BACTrack S80 breathalyzer
  • Hard-shell carrying case
  • Mouthpieces (6)
  • AA batteries (2)
  • Instruction manual
  • One-year warranty

Our Experience

The S80 provided consistent results with great accuracy. However, each test took about 30 seconds to load after blowing. The interface was straightforward and did not offer much beyond the reading of our team member’s current BAC.

Overall Rating4.2 out of 5
Speed3.5
Accuracy5
Interface4

What Customers Are Saying

Amazon Review Score: 4.6 out of 5 based on over 6,000 reviews

Countless customers praise the S80 for giving accurate results, especially customers who need the accuracy to activate Intoxalox devices in their vehicles. The only complaint from customers is this device needs to be recalibrated more frequently than expected.

Breathalyzers Buyers Guide

A collection of the best breathalyzers as reviewed by our team.

Before your next purchase, consider the following information regarding breathalyzers to help you make an informed purchasing decision.

What Does A Breathalyzer Measure?

A breathalyzer is an electronic device that measures one’s BAC. By measuring the alcohol content in one’s breath, a reliable indication of BAC can be obtained. Breathalyzers must be DOT-approved before they can be sold.

Portable breathalyzers tend to provide more accurate BAC readings than disposable ones and are reserved for personal use. They come with replaceable mouthpieces so they can be used multiple times.

Most portable breathalyzers are either battery-powered or rechargeable. A multitude of options are now compatible with smart devices such as Androids or iPhones that allow users to view past breathalyzer data and even measure how long until their BAC is at a safe level to drive.

How Long Will My BAC Show On A Breathalyzer After Drinking?

Generally, a breathalyzer test can detect alcohol for up to 12 hours after consuming one alcoholic drink. If your BAC is 0.08, it will approximately take about five hours for your body to metabolize the influence of alcohol enough to be considered “sober.” Genetic and environmental factors may affect this time, as well.

Best Breathalyzers: Bottom Line

Even if you purchase the best breathalyzer available to the general public, using one comes down to a mix of common sense. Physical traits like how quickly your body metabolizes alcohol, which differs from person to person, and other items you have consumed over the course of a day may impact the reading further. 

Even if a breathalyzer shows you are below the legal BAC limit, you should not get behind the wheel if your sobriety is in question. 

Our Review Standards

The breathalyzers in this article went through two rounds of reviews. We started by searching Amazon for top products, looking at factors like Prime shipping eligibility, customer ratings, Amazon superlatives, and price.

The five breathalyzers that best met these standards were ordered by our team for testing. A team member tested each product on a car, taking note of how accurate the breathalyzer’s readings were, how quickly it produced a reading, its ease of use, and its portability. Each breathalyzer was given a rating out of 5 stars based on these criteria.

Best Breathalyzers Testing Process

To test each breathalyzer, a member of our review team had a single five-percent ABV beer and then recorded their BAC using each of the breathalyzers. The next day, the same team member had between four and five of the same alcoholic beverages and recorded their BAC via the breathalyzers.

Why You Can Trust Us

Each year, we test over 350 auto products on vehicles and in our testing lab. Our team of product testers thoroughly researches top products, unboxes and puts our hands on each component, and tests the items on real vehicles before making recommendations to readers.

We publish hundreds of product and service reviews to bring car enthusiasts detailed guides on automotive tools, detailing kits, car seats, pet products, and much more.

Best Breathalyzers: FAQ

*Data accurate at time of publication.