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Customer Ratings & Reviews

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Customer reviews

Rating 3.6 out of 5 stars with 67 reviews

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75%
would recommend
to a friend

Customers are saying

Customers commend the Vio Smartphone Keychain Breathalyzer for its ease of use and compact size, describing it as "working great" and "quite accurate for a small Bluetooth device." However, concerns are raised regarding its accuracy, with some users expressing skepticism about its reliability compared to professional breathalyzers used by law enforcement. Additionally, the battery life of the device has been criticized for draining quicker than desired.

This summary was generated by AI based on customer reviews.

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 1 Showing 1-20 of 67 reviews
  • Cons mentioned:
    Accuracy

    Rated 3 out of 5 stars

    Novelty not 10% reliable

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    First off there are plenty of reviews on this item all over the itnernet. I use this with friends more as a novelty thing when we are out together or whatever. If you use this thing multiple times in a row it will spit out drastically different readings. I tried it last night and it said i was .009 then told me 2 minutes later i was 0.00, then .004 then .000? Not ayt all accurate i wouldnt rely on this thing to tell me not to drive somewhere if i had event he slightest bit of alcohol. I just dont drive if i even have a drop of alcohol a DUI is not worth losing your job, money, family issues and more. Possibly even worse killing someone even if its an accident that you didnt cause and your involved they will check you and if you register anything on their accurate BAC testers you will get hit with DWI or DUI. The moral of my review DO NOT RELY ON THE READINGS FROM THIS THING!! Its all over the place.

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use

    Rated 4 out of 5 stars

    Love the product!

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Love the product. Appears accurate and is easy to use. Although I like the fact you can use the app from your phone, I think it would be great if it also had a readout on the device where it wouldn't be required to use the app or your phone to complete the test

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Great with a glitch at times..

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I really love how the breathalyzer connects to my phone and not only states your BAC, but also predicts when you will be sober and how you may feel. The only downside to this product is that there is a glitch that happens here and there. It happens when you are told to"take a deep breath" and then the "blow now" screen should pop up, but sometimes it doesn't. My tip would be to delete the running app and try again, other than that, its a really nice tool and a greta price!

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use

    Rated 5 out of 5 stars

    Good for proof of sobreity

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Small enough to carry with you or for your son or daughter for those occasions when you are not sure you are ok to drive. Easy to connect to your phone. Test you, take a screenshot and you have proof you are clear to go.

    I would recommend this to a friend
  • Cons mentioned:
    Battery life

    Rated 5 out of 5 stars

    Safety on a chain.

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This little safety device on a key chain can prevent you from ending up in chains. It gives you a clear picture of your BAC. Keep a spare AAA battery with you it is power hungry.

    I would recommend this to a friend
  • Cons mentioned:
    Battery life

    Rated 4 out of 5 stars

    Pretty Good

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    the alcohol tester is great works every time i use it uses battery life pretty fast

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Good

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Does what it says, had no issues sinking to phone would recommend

    I would recommend this to a friend
  • Cons mentioned:
    Bluetooth connectivity

    Rated 3 out of 5 stars

    Good

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Product works well. But doesn't always connect to the Bluetooth easily

    I would recommend this to a friend
  • Cons mentioned:
    Accuracy

    Rated 4 out of 5 stars

    Solid Breathalyzer

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    No major issues with it. Normally only off by a little bit.

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use

    Rated 4 out of 5 stars

    Very good

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This product works very well for what is intended for

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use

    Rated 3 out of 5 stars

    Very good item

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Work Great ! Item is very eazy to use and works great.

    I would recommend this to a friend
  • Rated 2 out of 5 stars

    Broke after 2 weeks

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    It worked very well for a couple of weeks, but then ceased to return any level of alcohol reading (all readings were 0.00 BAC when I can promise the user was not at a 0.00 BAC). I purchased the $99 model afterward, and was much more satisfied.

    No, I would not recommend this to a friend
  • Pros mentioned:
    Ease of use
    Cons mentioned:
    Accuracy

    Rated 4 out of 5 stars

    Easy tool for testing

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    Posted . Owned for 1 year when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Quick, easy tool for testing BAC. I'm not positive how accurate it is but will give at least a rough idea.

    I would recommend this to a friend
  • Cons mentioned:
    Battery life

    Rated 4 out of 5 stars

    good tool. sucks battery.

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    If you follow the parameters, seems like a good tool. Of course, most people (including myself) won't have any method of checking accuracy. It does seem relatively accurate judging by my knowing myself & my limits. It seems to drain it's battery very fast, however, so I'd recommend pulling the battery when not in use. Also, it sometimes missed it's own prompts (maybe because of battery life?) In that it says "blow" but is still in its "warm-up" phase. Like I said, it's a good tool & with having a reference. Way cheaper than a dui or dwi.

    I would recommend this to a friend
  • Rated 4 out of 5 stars

    Easy set-up

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This product is easy to set-up and easy to use. I'm still not sure exactly how accurate it is, but it's good that it tell you to wait 15 to 20 minutes from your last drink to get an accurate reading.

    I would recommend this to a friend
  • Rated 3 out of 5 stars

    Have hopes for it

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    We have not yet figured out how to set it up. It would hve been helpful if we had gotten so instrucction at the store. I plan to bring it in and ask for additional help.

    I would recommend this to a friend
  • Cons mentioned:
    Battery life

    Rated 5 out of 5 stars

    Love it!

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Batteries run out quicker than I'd like, but because it does so much I understand why. No biggie.

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use

    Rated 5 out of 5 stars

    Excellent portable breathalyzer

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very portable and easy to use. Can be attached to your keychain.

    I would recommend this to a friend
  • Cons mentioned:
    Accuracy

    Rated 2 out of 5 stars

    Not worth it

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Totally inconsistent scores. Does not seem accurate. I don't trust it!

    No, I would not recommend this to a friend
    • Brand response from BACtrack Customer Support
      Posted .

      Sorry to hear you've been having some trouble with your BACtrack. Please contact BACtrack Customer Service at support@bactrack dot com or call 877-334-6876 and we would be happy to help you. All our products are backed by a one-year warranty.bactrack

  • Rated 4 out of 5 stars

    Good tool to prevent DWI

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Used new year's eve and made me quit drinking and sober up prior to driving.

    I would recommend this to a friend
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