Sample validation
A classifier on your exhalation flow curve rejects short blows and mouth-alcohol spikes — the two biggest sources of false readings — and coaches a clean retest instead.
Know your number before you turn the key.
OWI Labs makes AI-powered intoxication test kits — saliva strips and smart breathalyzers whose on-device AI validates every breath sample, corrects the sensor, and predicts your personal sober time. Because "I feel fine" is how every OWI story starts.
✓ Results in under 2 minutes✓ AI-validated samples✓ Ships discreetly, 21+✓ From $12
0.08%
legal limit, all states*
~0.015%/h
how fast BAC drops
2 min
to a reading
fig 01 · your BAC over an evening● AI sober-clock
AI inside
The sensor measures. The AI makes it honest.
Every kit runs a stack of on-device machine learning between your breath and your number — validating the sample, correcting for the real world, and rounding every doubt toward caution.
Compensation & drift correction
A regression model corrects the raw signal for temperature, humidity, altitude and sensor aging, and calls for calibration only when correction genuinely runs out.
Your personal sober-clock
Serial readings train a personal elimination model — a live, conservative prediction of when you'll be near zero. Near zero, not near the legal limit.
Read the full detection pipeline — all four models, in detail →
The kits
Three ways to check. One rule: when in doubt, don't drive.
CheckStrip saliva tests
$12 / 10-pack
Color-coded saliva strips. Tear, swab, read in 2 minutes. Toss a few in every jacket.
- Detects alcohol from 0.02% BAC
- No batteries, no calibration
- Great for parties & hosts
KeyCheck breathalyzer
$79
A digital BAC estimate that lives where your car keys do — with a green / amber / red zone light.
- Semiconductor sensor, digital readout
- Zone light: green · amber · red
- USB-C, 200+ tests per charge
OWI Pro fuel-cell kit
$199
The sensor tech used in professional screening devices, in a home kit with trend logging.
- Fuel-cell sensor accuracy
- 20 mouthpieces + carry case
- AI sober-clock + anomaly flagging
- App log: watch your BAC fall over time
⚠ Read this before you test
Every OWI Labs result is an estimate for personal awareness — not an evidential measurement and never a defense against an OWI, DUI or DWI charge. Impairment starts below 0.08%, your BAC may still be rising when you test, and no reading makes driving after drinking safe. If you've been drinking: hand off the keys, call a ride, or wait it out.
How it works
Test. Read. Decide like you'll remember it tomorrow.
STEP 01
Test
Swab or blow — 15 minutes after your last drink for an accurate sample.
STEP 02
Read
Your estimated BAC and its zone: green, amber or red. Amber and red mean the night drives you, not the other way around.
STEP 03
Decide
Ride, sleep, or wait — your body clears roughly 0.015% per hour, and nothing speeds it up. Retest before you even think about keys.
FAQ
What people ask before their first test
What does OWI stand for?
Operating While Intoxicated — the legal term used in states like Michigan, Wisconsin, Indiana and Iowa for driving impaired by alcohol or drugs. Other states call it DUI or DWI; the consequences are similar everywhere. Full explainer →
What BAC counts as OWI?
0.08% or higher for drivers 21+ in every state (0.05% in Utah), 0.04% for commercial drivers, and near-zero for drivers under 21. But impairment — slower reactions, worse judgment — begins well below the legal line. See the BAC guide →
Can a test result get me out of a charge?
No. Personal kits are awareness tools, not evidential devices. Only police-grade instruments and blood draws count legally — and by then the decision that mattered was already made.
If I blow under 0.08, can I drive?
A number under the limit is not a green light. Devices have margins of error, your BAC may still be climbing, and impairment starts with drink one. The kits exist to talk you out of the driver's seat, not into it.
What does the AI actually do?
Four things, all on-device: it validates your breath sample (rejecting short blows and mouth-alcohol spikes), corrects the sensor for temperature, humidity and aging, learns your personal elimination rate to power a conservative sober-clock, and flags implausible readings for retest. What it never does: tell you it's safe to drive. Full pipeline →
How fast does BAC actually drop?
About 0.015% per hour, give or take metabolism. Coffee, food and cold showers change how you feel — not your BAC. Only time works.
The cheapest OWI defense is never needing one.
A first-offense OWI typically runs thousands in fines, fees and insurance hikes — plus a license suspension. A kit costs less than one round.
Shop test kits →