Version Updates

For information about updates to Apple OS and Xcode versions, as well as Loop and Trio, click the links below:

• Updating your phone’s iOS
  • iOS/Apple Updates
  • Latest Tested iOS and Xcode Versions for Mac-Xcode Builders
• Update your OS-AID (Open Source Automated Insulin Delivery system)
  • Loop Updates
    • Loop Customization Updates
  • Trio Updates
• LoopFollow Updates

Loopers should not update to any beta version of iOS, macOS or Xcode.  There are no features in the beta version of any software that are more important than your ability to manage insulin delivery from your phone/medical device.  

iOS 27

iOS 27 was released on 14 September 2026.  We are not recommending iOS 27 yet because your looping phone is a medical device.  Please wait for the all-clear for iOS 27.2.

If you must update your looping phone’s iOS, then please

1. Commit to rebuilding frequently as the developers will be adding fixes for display and other glitches
2. Update to the latest version of Loop (3.14.11) or Trio (1.0.x)
3. Update your iOS

iOS / Apple Updates

We recommend that all loopers treat their phone as a medical device.  Please exercise caution when updating your phone’s iOS, especially for a major update such as iOS 26 to 27.  Minor updates are typically less problematic, but we test every update to be sure.  Auto updates should be off.

Turn off Auto-update

Do not set your Loop phone to auto-update its iOS version 

In iPhone Settings, go to General / Software Update / Automatic Updates.

1. Turn on “Automatic Downloads”
2. Turn off “Automatic Updates”

Once you upgrade the iOS, it can be very difficult (sometimes impossible) to downgrade.

It’s a good idea to do the same on your computer.  Both the operating system and Xcode should have auto-update turned off. But please, update as soon as the all-clear is sounded.  Updates can provide very important security fixes as well as nifty new features.

iOS versions

We recommend the latest iOS 26.x for all Loop, Trio and LoopFollow users.  We do not recommend iOS 27 (yet) although many people are using it successfully.

• Loop users should have the latest release, v3.14.11 or newer, on their phone
• Trio users should have the most recent Trio main 1.0.2 or newer, on their phone

What are the latest “tested” versions?

The Versions of macOS and Xcode that you need are based on your phone’s iOS.  These Versions have been tested to operate and build both the main and dev branches of Loop, LoopFollow, LoopCaregiver, and Trio.  This table includes the latest tested versions of iOS, along with the compatible minimum Xcode and macOS versions.  Loopers should not update to any beta versions.

Loop Updates

• Mac-Xcode builders – use the Build Select Script to build main       
  
• Browser Builders – make sure your default branch is main.
• If you need help, please ask on Facebook or Zulip

Loop Current Release:

• Loop 3.14.11 was released on 24 October 2026. See details here. This release is strongly recommended for all Loopers (except those who are on next-dev).There are important fixes that you can only get if you rebuild. (These important fixes are ported to next-dev, so if you are testing that branch, be sure to update and rebuild soon.)

Loop Recent Release History:

• • Check LoopDocs for release history

Trio Updates

If you need help, please review TrioDocs and ask on Facebook or Discord.

• Minimum iOS for Trio v1.0.x is 17.6

Trio version 1.0.2 was released on 7 October 2026 – all users are encouraged to update to get important fixes for Trio, pump managers and CGM managers.

Trio version 1.0.1 was released on 19 September 2026.

Trio version 1.0 was released on 15 September 2026.

If you have not updated Trio recently and you use Browser Build:

• The Browser Build process will not work until you take action, you need to Enable Time Sensitive Notifications to the Trio Identifier. (This is new, but instructions are included in the docs at the link provided)
• If you use the Mac Xcode build method- just download a fresh version using the Trio build select script and enjoy.

LoopFollow Updates

For more details, check-out the LoopFollow docs. If you need help, please ask on Facebook

LoopFollow version 7.1.0 was released on 20 September 2026

LoopFollow version 7.0.0 was released on 25 July 2026.
This is a big release — rebuilt charts, an onboarding guide, custom alarm sounds, smarter alarms, and a long list of fixes.  ⚠️ iOS 18 required

If you have not updated LoopFollow recently and you use Browser Build:

• The Browser Build process will not work until you take action, which includes running the action Add Identiifers, Creating the LoopFollow App Group (if you don’t already have one), adding the LoopFollow App Group to the LoopFollow Identifiers and running the action Build LoopFollow.
  If you use the Mac Xcode build method- just download a fresh build and enjoy.

More Information

You should always be in a position to build your OS-AID system when necessary. The best practice is to use Browser Build (which takes care of Xcode compatibility for you) or to upgrade your build computer to the required macOS and Xcode version before upgrading the iOS on your iPhone.  Of course, that’s your choice.

Bookmark this page!  {DO THIS NOW!} Come back when you have a version question in the future.

This page will be kept up-to-date as new versions are released.  You can also sign up for the newsletter, but new version updates may not always be included in the newsletter.  This page is your best “one-stop shop” to answer general questions about versions and compatability.