How to Read FreeStyle Libre Data

Get to know how to read all of your data, step-by-step, with the [FreeStyle Libre app/reader].

FreeStyle Libre 2 reader showing a glucose reading

Get to know your home screen.

Your FreeStyle Libre app’s home screen is your go-to place for quickly accessing your most recent glucose data. On your home screen, you’ll see:

Green, yellow, orange, or red banners that provide your real-time² glucose readings.
A graph showing glucose trends and your most up-to-date glucose readings for the current time period.

Once you’re used to accessing and reading the information on your home screen, you can navigate to the Daily Graph. To find the Daily Graph, go to Insights in the bottom toolbar and click the Daily Summary tab at the top. (Libre app)/click on the menu in the top left and find the Daily Graph tab under Reports. (FSL 2/FSL 3 apps).

A woman wearing a sensor showing her glucose data on her phone with her husband.

Accessing your Daily Graph.

Your Daily Graph shows your glucose over a period of time, helping you see broader patterns.

See where levels are throughout a day’s timeframe
Log notes, like meals or movement
Add insulin information
See when you scanned throughout the day
View high and low glucose alarms

Get further insights in your Reports tab.

After five days of collecting data, your [FreeStyle Libre system] will have more data you can use to get historical glucose data.

To access your Reports, go to Insights in the bottom toolbar and click the Reports tab at the top (Libre app)/click on the menu in the top left and find the Reports section. (FSL 2/FSL 3 apps).

Here’s what your Reports can show you:

FreeStyle Libre reader and its real time glucose monitoring information.

Time in Ranges

Your Time in Ranges report shows how much of your day your glucose stayed above, below, or in your target range. The percentages in the graph tell you exactly how much time you spent steady. The standard graph is based on a Target Range of 70-180 mg/dL^25,55.

FreeStyle Libre reader and its ability to show how much time is spent in each glucose range.

Average Glucose

See the overall average of your sensor readings—plus how those averages shift throughout the day.

Your main average appears at the top. Below, see how your levels tend to look in the morning, afternoon, evening, and overnight.

The colors help you read your averages at a glance:

Green means you’re in range.
Yellow, orange, or red show times when your glucose moved above or below your target.

FreeStyle Libre reader and a visual showing the direction of change for a glucose reading.

Low Glucose Events

The Low Glucose Events chart displays times when your glucose dropped below your set levels over a period of time.

Daily Patterns

Your Daily Patterns graph helps you see the rhythm of your glucose throughout a typical day. Here’s how to read it:

The thick line shows the midpoint of your readings — your day’s “center line.”
The inner shaded band shows where most of your readings land.
The outer shaded band shows the full spread of your readings.

Glucose Management Indicator (GMI)

Your Glucose Management Indicator (GMI) gives you an estimate of what your [A1c/HbA1c] might look like based on your average sensor glucose.

It uses your day-to-day readings to show how steady your levels have been over time. Think of it as a snapshot of how your overall glucose management is trending.

The percentage you see reflects that estimate—and helps you track your long-term progress.

How to use your data in everyday situations.

Here’s how real-life moments can turn into learning opportunities.

Time in Ranges

Average Glucose

See the overall average of your sensor readings—plus how those averages shift throughout the day.

Your main average appears at the top. Below, see how your levels tend to look in the morning, afternoon, evening, and overnight.

The colors help you read your averages at a glance:

Green means you’re in range.
Yellow, orange, or red show times when your glucose moved above or below your target.

Low Glucose Events

The Low Glucose Events chart displays times when your glucose dropped below your set levels over a period of time.

Daily Patterns

Your Daily Patterns graph helps you see the rhythm of your glucose throughout a typical day. Here’s how to read it:

The thick line shows the midpoint of your readings — your day’s “center line.”
The inner shaded band shows where most of your readings land.
The outer shaded band shows the full spread of your readings.

Glucose Management Indicator (GMI)

Your Glucose Management Indicator (GMI) gives you an estimate of what your [A1c/HbA1c] might look like based on your average sensor glucose.

It uses your day-to-day readings to show how steady your levels have been over time. Think of it as a snapshot of how your overall glucose management is trending.

The percentage you see reflects that estimate—and helps you track your long-term progress.

How to use your data in everyday situations.

Here’s how real-life moments can turn into learning opportunities.

How to use your data in everyday situations.

Here’s how real-life moments can turn into learning opportunities.

Before breakfast.

You wake up, check your [FreeStyle Libre app/reader], and see your glucose at 115 mg/dL [6.3mmol/L] and rising. That trend arrow tells you something’s shifting. Maybe it’s stress, a late-night snack, or just your morning routine.

What it could mean: This is your cue to pause and consider small adjustments, like timing your insulin or breakfast differently.

After a walk.

You finish your usual loop and suddenly feel shaky or sweaty. You check your [FreeStyle Libre app/reader] and your glucose is reading low.

What it could mean: This is a sign to bring your glucose levels back up, and to make sure you have a snack or meal before your next bout of movement.

The more you track, the clearer patterns become.

The longer you use your FreeStyle Libre system, the more your data reveals about what works best for your glucose. You’ll start to see how one choice today shapes how you feel tomorrow.

Quick tip: Try setting a GMI goal with your doctor.

Take a moment each week to look at your GMI, and try setting a new goal for yourself with the help of your healthcare provider or healthcare team. Goal setting is a way to measure your progress and watch how you overcome challenges. You’ve got this.

Connecting the data

Get to know your home screen.

Accessing your Daily Graph.