Longtime type 1, blogger and author Joanne Milo is back with another review -- this time of the Apple Watch with the Dexcom G4 Share2 app for viewing and sharing of glucose data results.



  • can view streaming CGM data right on your wrist
  • can see and share your data on up to 5 iPhones or iPads
  • shows your latest reading (it takes 2-3 seconds to display) with a 3-hour graph and arrow indicating whether your BG is rising, falling or steady
  • it is water-resistant
  • iPhone screen is full-color and easy to read in sunlight
  • has a “coolness” factor, if you love Apple products
  • can use the Apple Watch for BG viewing alongside other functions like email, text, weather, fitness, camera, etc.
  • if willing to spend more money, there’s a big choice of watchband design options, including growing market of 3rd party models that are easily interchangeable
  • no extra costs for hosting and data plans, as you might find when using Nightscout


  • still need to carry the Dexcom G4 Share receiver
  • no alarms on iPhone app; you still have to rely on the Dexcom G4 receiver for alerts 
  • you have to “wake” it by either tapping the scroll button or turning your wrist a quarter-turn; otherwise watch face is black, not even displaying the time
  • when woken, the display only stays on for about 10-15 seconds before going to "sleep"
  • shows only 3 hours of data, as opposed to 3, 6, 12 and 24 hour options on the G4 receiver
  • limited to only 5 followers, who, using the Dexcom Share Follow app, can only see your data on their Apple iPhone (not yet available on a follower’s Apple Watch or on Android)
  • if you are still using the original G4 receiver (without Share), need to upgrade for $199 (if out of warranty, a new G4 with Share is $599 out-of-pocket, without insurance)
  • lots of charging required! Apple Watch has a very limited battery life, plus you will need to charge your iPhone more frequently
  • display shows lots of preloaded Apple apps that you cannot delete or hide, making the screen very cluttered
  • Apple Watch is pricey, depending on size (38mm or 42mm) and design; the most basic model runs starts at $349
  • either size Apple Watch is large and probably will not fit on a child


Let us know what you think!


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This content is created for Diabetes Mine, a consumer health blog focused on the diabetes community. The content is not medically reviewed and doesn't adhere to Healthline's editorial guidelines. For more information about Healthline's partnership with Diabetes Mine, please click here.