While smartphone breathalyzers have been getting a lot of attention for their convenience, many prosumers have zero confidence in their accuracy. The AlcoMate Revo Breathalyzer [$250] is different.

Here’s how the tech works: Breathalyzer sensors need to be regularly re-calibrated to ensure accuracy. This process usually means having to send the breathalyzer in for routine maintenance, but eventually the sensors wear out, and the product must be replaced. AlcoMate products have patented technology involving replaceable sensors, so they never have to be sent in, can always be manually re-calibrated, have a longer lifespan, and can be returned to day-one accuracy by the user. Think of it as buying a new set of cartridges to replace your dull razor blade rather than continuing to waste your money on disposable razors.

Buy: Alcomate