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Compatible iPhone

Overview

Time Estimate

  • 5 minutes, to check your device and iOS
  • 20 minutes, if need to update your compatible device to a new iOS
  • 10 minutes, if you need to order a Compatible Device
  • 0 minutes, if you own an Android and will not use Apple products; check out AndroidAPS Documention

Summary

  • Check your iPhone against the Compatible Device list
    • For all devices, the newest iOS is strongly recommended
  • Make sure the phone has good battery life
  • Turn off automatic updates

FAQs

  • "Can I use an android?" No. Check out AndroidAPS Documention.
  • "Can I use an iPad?" No. Older iPads do not support Apple Health which is required for the Loop app. It may be possible with newer iPads and newer iOS, but this has not been tested.
  • "Does my iPhone need a cell plan?" No. The Loop app works using communication on your phone with your CGM and your pump; no internet connection required. However, if access to Dexcom Follow or Nightscout monitoring of the Loop app is a priority, then a cell plan may be desired.
  • What watches work with the Loop app? Only Apple watches work with the Loop app. With iOS 17, some of the older Apple watch series are no longer compatible. See: Watch Hardware and OS Requirements

Which Devices Are Compatible?

The Loop app requires an Apple device and uses the Apple Health app to store and retrieve your blood glucose and insulin data and to store your carbohydrate records. Older iPads do not support Apple Health which used to be required, and is still strongly recommended, for the Loop app. It may be possible to run Loop with newer iPads and newer iOS, but this has not been tested.

You need a minimum version of the mobile operating software, called the iOS, to be installed on your iPhone. It is strongly advised your phone hardware support and be updated to the most recent iOS. This is for security and feature compatibility for Loop and companion apps.

Update Older Phones!

Some CGM vendors are limiting which iOS versions, and therefore which phones, are supported by their apps.

The Compatible Device list in LoopDocs is updated to reflect that. Devices that cannot be updated to the latest iOS version are treated as incompatible.

Compatible Device

All the devices listed below are currently compatible with Loop. They are separated by the available iOS for the phone.

These phones require iOS 26 and Loop version 3.8.x or newer

  • iPhone 17, all variants

iOS 26 requires Loop v3.8.2 or newer

Any iPhone 17 must run iOS 26. You must install Loop v3.8.2 or newer before updating to iOS 26. Loop v3.7.x and earlier do not to support iOS 26.

Do not attempt to run an older version of Loop on any iOS 26 phone, use Loop v3.8.2 or newer.

These phones require iOS 18 and are compatible with iOS 26.

  • iPhone 16 is compatible but not recommended for use with Omnipod DASH

These phones are compatible with iOS 17, 18 and 26

  • iPhone 15, all variants
  • iPhone 14, all variants
  • iPhone 13, all variants
  • iPhone 12, all variants
  • iPhone 11, all variants
  • iPhone XR, XS, XS max
  • iPhone SE (3rd generation or later model; 2022 first release)
  • iPhone SE (2nd generation; 2020 first release)

Not Supported

The Older Devices listed below are no longer supported by some CGM vendors and should be considered incompatible

  • Please update your phone hardware and iOS as soon as possible

Older Devices

These phones are limited to iOS 16. No longer supported by Dexcom. Update ASAP.

  • iPhone X, without an extra letter
  • iPhone 8, all variants

Find Your iOS

Your iOS version can be found under the phone Settings -> General -> About display on the iOS Version line as shown below.

phone current iOS display

Do not use any of the beta iOS versions. (If you are uncertain what that means, then you are not using one.)

Developer Mode - Mac Build Only

When you build the Loop app using Build with Browser, you are not required to enable Developer Mode on the phone or watch.

With iOS 16 or newer and watchOS 9 or newer, Apple added a feature. If you want to know more, click on this Apple Link about Developer Mode.

When you build the Loop app on your phone from Xcode directly and then transition to or start with iOS 16 or newer, you need to have Developer Mode enabled. This is also a requirement to use the Loop app on a watch paired to your phone running watchOS 9 or newer. You will be told to enable it in the Build the Loop App: Prepare your Phone and Watch instructions.

Developer Mode with iOS 16 or newer, watchOS 9 or newer

If you already have the Loop app built with Xcode on your phone/watch when you update to iOS 16 or newer/watchOS 9 or newer or newer, you will be told that the Loop app requires Developer Mode to run.

You will not be able to run the Loop app on your phone (or watch) until you have enabled Developer Mode on the device(s).

phone message if trying to run xcode app without developer mode enabled

Battery Health

Make sure the battery on your phone is solid. Your phone will become a critical health device - you want it to keep working.

  • Make sure a charger and cord are in your diabetes supplies
  • Consider buying a battery pack, keep it charged, and add it to your travel bag

Low Power Mode

With newer iOS, some people have reported the Loop app continues working in the background (phone locked) even in Low Power Mode. Others have reported they still get red loops. You can experiment to determine if your phone/iOS/app is able to maintain green loops in low-power mode. Otherwise, the best practice is to avoid Low Power Mode.

Use Automatic Time

Be sure to set the phone to automatic time. Do not try to defeat a game by modifying time on the same phone used to control your insulin.

Please read: The Loop Phone Must be on Automatic Time.

Turn Off Automatic Updates

Apple provides updates regularly to the iOS. Often, these updates include critical security patches in addition to improved new features.

Please be proactive - install updates as soon as the all-clear is given for using the Loop app with that iOS update.

If a limitation on your Mac prevents you from updating your phone to the latest iOS, switch to using Build with Browser.

Update While Awake and Aware

The suggestion is to turn off automatic install of updates so you can be awake and aware when you do an iOS update. Otherwise, it happens in the middle of the night.

For major updates, for example iOS 18 to iOS 26, we suggest you hold off until the initial bugs get worked out. In other words when iOS 26.1 was released, the OK was given for everyone to update to iOS 26. Often, that includes an update to the Loop app to accommodate changes in the phone operating system.

For minor updates, for example iOS 26.1 to iOS 26.2, update at your earliest convenience.

Why Turn off Automatic Updates?

  • Once you accept an iOS phone update, you cannot go backwards
    • Some iOS updates require updates to Xcode and macOS before people can build the Loop app on that device again
    • It is rare, but iOS updates have caused the Loop app to stop working until other updates were made and the Loop app was rebuilt on that phone
  • Turn off automatic updates so you can choose when to update your phone and avoid being caught without your Loop app
  • Google the instructions for your device:
    1. Configure your phone to automatically download the updates
    2. Choose to install the updates manually

When iOS updates are released, the Loop and Learn Version Updates page is typically updated faster than LoopDocs. Check to see if a new update is causing an issue with the Loop app or your CGM before accepting the update from Apple.

Within a few days, the "All-Clear" or (very rare) the "WAIT there is a problem" message will be posted.

Next Step: Compatible Pump

Now you are ready to check if you have a Compatible Insulin Pump.