알코즈 음주측정기 is a free Android app developed by YOONTEC. It allows users to easily measure their blood alcohol content (BAC) by connecting their mobile phone to a breathalyzer device via USB. The app guides users through a step-by-step process to ensure accurate measurements within the BAC range of 0.01% to 0.05% (Note: as of June 25, 2019, the legal BAC limit for driving in South Korea is 0.03%).

The measurement process consists of the following stages:

• Start: The initial stage where users need to connect the breathalyzer device to the USB port to proceed.
• Preparing: The preparation stage where users ensure the breathalyzer is ready for accurate measurement. Once prepared, it automatically moves to the next stage.
• Measure: The measurement stage where users follow the on-screen instructions to blow into the breathalyzer's measurement port.

After the measurement, the results are categorized as follows:

• Normal: BAC below 0.01%
• Caution: BAC between 0.01% and 0.03%
• Warning: BAC above 0.03%
• Failed: If the measurement was not conducted accurately.

With 알코즈 음주측정기, users can easily and conveniently measure their BAC levels, ensuring they make informed decisions regarding alcohol consumption and driving.