I built a BAC tracking app — and most people misunderstand how alcohol actually works
I’ve been working on AlcoInsights, a tool that tracks your Blood Alcohol Content (BAC) in real-time based on your profile and drinking patterns.
What surprised me while building it:
Most people underestimate how long alcohol stays in the body
Drinking speed matters more than people think (not just total drinks)
Small differences in weight, gender, and timing can change BAC quite a lot
So I built a version that:
tracks BAC live during a session
estimates time to sobriety
highlights drinking pace (fast vs slow)
includes legal driving limits by country
👉 You can try it here:
I’m now trying to understand:
Does this feel useful in real life?
What’s missing for you to actually use something like this?
Would you trust a tool like this?
Would you use this more as a real-time tracker, or more as a planning tool before drinking?
Happy to get any feedback — especially from people into quantified self / health tracking.

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