Blog
Practical guides on sleep, blood oxygen and pulse oximetry — how to read your overnight data and use it to sleep better.
- odisleep apnea
What Is ODI? Understanding the Oxygen Desaturation Index
The Oxygen Desaturation Index is the single number that best summarizes your night of breathing. Here's what it counts, what a normal ODI looks like, and how to read yours.
- heart ratecvhr
What Your Overnight Heart Rate Reveals About Your Sleep
Your pulse doesn't switch off when you fall asleep - it tells a detailed story about how well you're actually resting. Here's how to read overnight heart rate and the CVHR pattern.
- pulse oximetryaccuracy
Why Your Pulse Oximeter Reading Might Be Wrong (and How to Get a Reliable One)
Pulse oximeters are accurate - until they aren't. Cold hands, nail polish, movement, and skin tone can all skew a reading. Here's how to spot a bad number and record clean overnight data.
- altitudespo2
Blood Oxygen at Altitude: What Happens to Your SpO₂ When You Travel or Sleep High
Your blood oxygen falls as you go up - and it can drop further while you sleep. Here's what happens to SpO₂ at altitude, what's normal, and how to track your adjustment safely.
- sleep apneasnoring
Snoring vs. Sleep Apnea: What Overnight Oxygen Data Can (and Can't) Tell You
Not all snoring is sleep apnea, and not all apnea is loud. Here's how overnight blood oxygen and heart-rate data help you tell ordinary snoring from something worth investigating.
- sleepspo2
How a Pulse Oximeter Can Help You Improve Your Sleep
Your blood oxygen and pulse tell a story about your nights. Here's how an overnight pulse oximeter reveals what's quietly disrupting your sleep — and what to do about it.