How to View Your CGM Readings on Your Phone
Continuous glucose monitors like Dexcom and FreeStyle Libre send real-time blood sugar readings to your phone. How to set up the companion apps.
At a Glance
Download the right app for your CGM
~23sQuick Tip
Make sure to download the correct app for your specific CGM model. They are not interchangeable — a G6 app will not work with a G7 sensor.
Create your account
~16sPair the app with your sensor
~27sWarning
CGM readings are for trend monitoring and require confirmation from a finger-stick blood glucose meter before making insulin dosing decisions. Follow your healthcare provider's guidance.
Set up glucose alerts
~26sQuick Tip
Quick Tip: Make sure the app has permission to send notifications and that your phone is not silenced during sleeping hours if overnight alerts are important to you.
Share readings with a caregiver
~23sYou Did It!
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If you or someone you care for uses a continuous glucose monitor (CGM) for diabetes management, your smartphone can be a key part of how you track blood sugar levels. Both major CGM brands — Dexcom and Abbott FreeStyle Libre — have companion apps that display readings on your phone in real time.
A CGM is a small sensor worn on the skin (usually the arm or abdomen) that measures glucose levels continuously throughout the day and night — no finger sticks needed for routine readings. The sensor transmits data wirelessly to your phone or a dedicated receiver.
Dexcom G6 and G7
: The Dexcom app shows your current glucose level, a direction arrow showing whether it is rising or falling, and a graph of the last 3 hours. You can set high and low alerts that vibrate or sound an alarm on your phone. The Dexcom app also allows optional "sharing" — your readings can appear in real time on a caregiver's, parent's, or family member's phone.
Abbott FreeStyle Libre 2 and Libre 3
: The LibreLink app (also called LibreLinkUp) shows readings and alarms similarly. Libre 3 transmits every minute continuously like Dexcom. Libre 2 transmits automatically when it detects you are close to a phone.
Having readings on your phone means you see your glucose without reaching for a separate receiver device. You can also share your data with your doctor via each company's cloud platform (Dexcom Clarity, LibreView).
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