Hydration Check: A 2-Second Self-Assessment
Track urine color and void frequency with a validated clinical scale — no gimmick camera, just honest science.
Your Urine Tells You What Your Water Bottle Can't
Drinking water is step one. Knowing if you're actually hydrated is step two. Concentrated urine is where kidney stones form, and color is the simplest validated indicator.
2 Seconds, Not 2 Minutes
Tap a color. Done. No photos, no camera alignment, no waiting for AI. A habit you'll actually keep.
Clinically Validated
The Armstrong scale (1994) is used in sports medicine, military, and clinical research. Not a gimmick — real science.
Trends Over Time
A single check means little. A week of morning voids tells your real hydration story. See patterns you'd miss otherwise.
The Armstrong Scale: 6 Levels of Clarity
Each level corresponds to a validated hydration status. Tap the color that matches, and Hydration Check does the rest.
Why We Don't Use a Camera
Some apps promise to read your urine color through your phone camera. The evidence shows this approach is unreliable. Lighting, toilet bowl color, camera sensor variation, and screen calibration all introduce errors. A 2-second self-assessment against a standardized chart is more accurate in real-world bathroom conditions.
We chose science over gimmicks.
The Science Behind Urine Color
Learn why urine color is the most practical daily hydration indicator and how the Armstrong scale was validated against laboratory measurements.
Read the full science behind Hydration Check