What 726,271 CGM readings from our users show

Reviewed by the JForH team · 2026-10-30

Across 37 Journey for Health users who wore a CGM for at least a week, the median person spent 88% of the day between 70 and 180 mg/dL. Glucose peaked around 6–7 am and again around 6 pm. A typical rise was about 63 mg/dL and reached its peak after about an hour.

Where do these numbers come from?

They come from 37 Journey for Health users who wore a continuous glucose monitor (CGM) with us between 2026-06-28 and 2026-10-30. Each had at least seven days of sensor data. Together that's 726,271 readings across 582 sensor-days.

You won't find any one person's data here. Every number below describes a group of at least 20 people.

Most people in this group joined to manage or prevent type 2 diabetes. We don't have a confirmed diagnosis for everyone, though, and the group is small and chose to sign up. So read these figures as a picture of our users, not of everyone with diabetes.

What is a good time in range on a CGM?

For most adults with diabetes, the international target is more than 70% of the day between 70 and 180 mg/dL. Less than 4% of the day should be below 70, and less than 25% above 180.

The typical person in our group did better than that. The median person spent 88% of the day in range. Here's the full picture:

Not everyone was there. The middle half of people ranged from 55% to 97% time in range, which is a wide spread. 68% of people met the more-than-70% goal, 95% kept lows under 4% of the day, and 65% had a GMI under 7%.

To see how GMI ties to the average, take the median person's 132 mg/dL. Put it in the GMI formula and you get about 6.5%, the A1C you'd expect from that average.

Why is my blood sugar highest in the morning?

You're not alone. In our group, glucose was highest around 6:00–7:00 in the morning, often before breakfast.

Averaged across everyone, glucose was lowest around 1:00 at night. It climbed through the early morning to that 6:00–7:00 peak and stayed raised through the day. A second peak came around 18:00, then it fell through the evening and night.

Look at the jump from 124 at 1:00 to 157 by 6:00. Morning hormones push glucose up, often before breakfast. If your own morning numbers run high, show your doctor. They can tell you whether it needs a change in treatment.

How long after eating does blood sugar peak?

About an hour. The median rise in our group reached its peak 65 minutes after it started, and went 63 mg/dL above where it began.

The app flags a rise when glucose climbs quickly from a steady level. We counted 3,309 rises from 46 people. That is more than the 37 above because rises count from anyone who wore a sensor, even for less than a week. So if you start at 110 mg/dL, a typical rise in this group would top out around 173 a little over an hour later.

More rises started in the morning than at any other time of day. A rise isn't always a meal, though. The morning climb, stress, illness and some medicines can all push glucose up.

How did we work out these numbers?

• We used sensor readings between 40 and 400 mg/dL and left out calibration readings.
• We counted a person only if they had at least seven days of data and, on average, at least half of each day's readings.
• We left out staff, test and demo accounts.
• For each person we worked out time in range, time above and below, GMI (3.31 + 0.02392 × average glucose) and CV (standard deviation ÷ average). Then we took the median and the middle half (25th to 75th percentile) across people.
• We only publish figures that describe at least 20 people. No names, dates of birth, locations or individual readings leave our systems.

See your own daily pattern (free check)

Last updated: 2026-10-30. Educational information, not medical advice. Talk to your doctor before changing your treatment.