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Dexcom ONE Mobile App

Why did I receive a message to update my Dexcom ONE app?

Last Updated · November 3, 2022

It is important to update the Dexcom ONE mobile application when a new app version becomes available to ensure the best possible outcome from the Dexcom ONE continuous glucose monitoring system and mobile application when used with your compatible smartphone†.

App updates ensure performance enhancement and bug fixes.

† For a list of compatible devices, visit


5-step learning journey

Discover education resources, organised in a 5-step journey, to learn key information about your Dexcom ONE CGM system, from getting started, your first 10 days, to using Dexcom ONE in the long run.

Step 1: The basics of CGM
Step 2: Getting started
Step 3: Your first 10 days
Step 4: Using Dexcom ONE in the long run
Step 5: Understand your Diabetes trends