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

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 / 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 18 to 26.  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 and Trio users.

There are a few special warnings for loopers who update to iOS 26.x:

• Loop users should have the latest release, v3.10.0 or newer, on their phone
  • Loop 3.8.2 is a bare minimum for use with iOS 26
• Trio users should have the most recent Trio dev, 0.6.0.41 or newer, on their phone
  • Trio 0.6.0.9 is a bare minimum for use with iOS 26

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.  We do not know why, but GitHub is disabling the Build Loop Action for LoopWorkspace forks. You will need to manually Enable the Build workflow and Build Loop – we suggest you do this once a month.
• If you need help, please ask on Facebook or Zulip

Loop Current Release:

• Loop 3.10.0 was released on 10 January 2025; see details here
• Adds G7 15-day support
• Adds Live Activity (live_activity customization not needed)
• Enables G6/G7 default to upload glucose (dexcom_upload_readings customization not needed)

Loop Recent Release History:

• Loop 3.8.2 was released on 31 October 2025; see details here.
  • Restores ability to save some therapy settings and restores Save button behavior (enabled is blue, disabled is grey)
  • Warning for Dana users – this version does not support Dana but feature branch now provided to support Dana and Medtrum pumps
• Loop 3.8.1 was released on 23 September 2025; see details here.
  • Fixes designed behavior of tapping on the bolus line should automatically replace the recommended value with zero, which stopped working after changes were made to this interface to accommodate iOS 26
  • DanaKit and other updates
• Loop 3.8 was released on 14 September 2025; see details here.
  • Adds support for Dana-i and DanaRS-v3 pump models
  • Updates translations and convert to String Catalogs
  • Supports iOS 26

Loop Customization Updates

• When updating from Loop 3.6.0 (released on 23-April-2025) or later to Loop 3.10.0 (released on 10-January-2026):
  • Browser Build users must remove 2 customizations from their build_loop.yml files: “dexcom_upload_readings” and “live_activity”. Both of these customizations are included in Loop 3.10.0. If you leave them in, your build will fail. Be sure that the last customization you have in your build_loop.yml file does not end with a continuation character. If those directions are not clear for you, please ask for help.
  • Users of the Dana pump – Browser Builders – use the feature branch feat/dev-dana-medtrum or you can modify your build_loop.yml file to use the new version of the pump addition found at this link

Trio Updates

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

Please build the dev branch for Trio and update frequently. It was updated on 10 January 2026 to dev version 0.6.0.41

• You need dev version 0.6.0.41 or newer to use 15-day G7 Sensors

Trio Release History

• The Trio 0.6.0 series of versions was started on 6-October-2025; see details here.
  • Display latest dev version in Settings for non-main builds
  • Add steps in Onboarding for uploading to Nightscout
  • Add toggle for external insulin in Shortcut Action
  • Implement APNS feedback for Remote Commands

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.