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By Pump Peelz

iPhone Duo and Diabetes Apps: What to Know Before You Upgrade

Apple's first foldable iPhone is here. If you wear a CGM or a pump and run it from your phone, the big question is simple: will my diabetes apps work on it? Here is what we know as of November 3, 2026, and what to check before you switch.

What is the iPhone Duo?

Apple announced the iPhone Duo on September 9, 2026. It went on sale October 23 in more than 70 countries, with 28 more added October 30. Key details from Apple:

  • A 7.6-inch inner display when open and a 5.4-inch outer display when closed
  • A20 Pro chip and a dual-battery design rated for up to 24 hours of typical use
  • eSIM only, no physical SIM tray
  • Ships with iOS 27.1
  • Starts at $1,999 for 256GB, in Star White and Night Sky

Will my diabetes apps work on it?

The honest answer right now: not confirmed for most of them yet. Medical device makers test each phone model and each iOS version before they add it to their official lists. A brand new phone, and a brand new shape of phone, usually takes some time.

Here is where things stood when we checked each maker's list on November 3, 2026:

  • Dexcom G7: Dexcom's compatibility list goes up to iPhone 18 Pro and 18 Pro Max. The iPhone Duo is not listed. Dexcom's highest tested iOS version is 26.7.1, and the Duo ships with iOS 27.1. Dexcom recommends not updating to an OS version before it appears on their list.
  • Omnipod 5: Insulet's iPhone list includes iPhone 18 Pro and 18 Pro Max on iOS 27. The iPhone Duo is not listed. Insulet also notes the app does not support beta iOS versions.
  • Tandem Mobi and t:slim X2: Tandem supports iOS 27 on its listed iPhones, up to iPhone 18 Pro and 18 Pro Max. The iPhone Duo is not listed.
  • FreeStyle Libre 3: The App Store lets you install the app on the iPhone Duo. But Abbott's own compatibility guide does not list the Duo or iOS 27 yet. Being installable is not the same as being tested by the maker.
  • Dexcom Stelo, twiist and others: We did not find the iPhone Duo on any list. Check each maker's site directly.

Lists change often, so check the links in the sources below for the latest.

What could be different on a foldable?

A few things are worth watching once makers start testing:

  • Two screens. Apple says apps built for iOS 27.1 can use both displays fully. Older apps may show black bars or only fit one screen. That is about looks, but make sure alerts and readings are easy to see on both screens.
  • Bluetooth and battery settings. CGM and pump apps rely on a steady Bluetooth link and background running. A new phone can mean new default settings.
  • eSIM only. This matters for calls and texts more than your apps, but plan your carrier switch before setup day.

Before you upgrade: a simple checklist

  1. Check every app you rely on. Look up your CGM, pump and any follow apps on the maker's compatibility page. Look for both the phone model and the iOS version.
  2. Keep your current phone working. Do not wipe or trade in your old phone until your apps are confirmed on the new one. A working backup display is worth more than a trade-in credit.
  3. Turn off automatic iOS updates. Dexcom and Tandem both suggest updating manually so a surprise update does not change your settings.
  4. Back up first. Make a full iCloud or computer backup. Note your app logins, alert settings and any follow or share invites.
  5. Know your sensor and pump transfer steps. Some systems let you move to a new phone mid-sensor, and some do not. Some pump apps need you to move settings over. Read your maker's guide on changing phones before you start.
  6. Check your alerts after setup. Confirm sound, Focus modes, Critical Alerts and notification permissions are on. Test them.
  7. Have a backup plan. Keep your receiver, controller or meter handy during the switch.

And as always, follow your device maker's instructions and talk with your care team about any changes to how you manage your diabetes.

Apple Health and the Duo

Apple Health comes with iOS, so it will be on the Duo. Whether your CGM or pump app shares data into Health on the Duo depends on the app itself being supported. Once your apps are confirmed, check the sharing settings in both the app and the Health app after you move.

Make your new setup feel like you

New phone, new look? While you wait for your apps to catch up, have some fun with style. Our Peelz patch covers and device stickers are decorative designs for your CGM and pump, so you can match your gear to your new phone's finish, or go full color. Designed and printed in Pittsburgh, PA.

The bottom line

The iPhone Duo is real and on sale. As of November 3, 2026, we could not find it on the official compatibility lists from Dexcom, Insulet or Tandem, and it is not yet on Abbott's tested list. If your diabetes apps matter to you every day, wait until they are confirmed, and keep your old phone ready until then.

Sources

Pump Peelz products are decorative and are not affiliated with or endorsed by Apple, Dexcom, Insulet, Tandem or Abbott. All trademarks belong to their owners.

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All referenced trademarks are the property of their respective owners. Pump Peelz is not affiliated with or endorsed by any device manufacturer. Products are decorative accessories only. Devices not included.