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Welcome to News from Loop and Learn

Master Your DIY Closed-Loop Insulin Delivery System

Published on 23 January 2026

In this edition:

Upcoming Open Mics

Our next Open Mic is on Saturday January 24. Everyone is always welcome and invited!

Loop and Learn: Informal Discussion (Open Mic) virtual meetings are scheduled on the second Thursday of each month and the fourth Saturday of each month.

There is also an Italian Open Mic on the last Tuesday of each month for iOS and Android loopers (with Patrick Sonnerat for AAPS).

Calendar

Topic Recorded? Time Date
Loop and Learn: Informal Discussion
Open Mic on 4th Saturday
Zoom		 no 22:00 UTC 24 January 2026
Loop and Learn Italia: Informal Discussion
Open Mic on last Tuesday of each month
Now Using Zoom		 no 19:00 UTC 27 January 2026
Loop and Learn: Informal Discussion
Open Mic on 2nd Thursday
Zoom		 no 19:00 UTC 12 February 2026

Video Conference Sessions use the following links every month. Notice - they now have easy-to-remember shortcuts:

Time Zone Converter

Need help figuring out when an event happens in your time zone? Try the SavvyTime: UTC Converter.

Time to Agree Again

New Apple Developer agreement terms have surfaced- they must be agreed to by March 17, but do yourself a favor and do it now!

Loop v3.10.0 Release

Loop version 3.10.0 was released on 10 January 2026.

Among other updates, this provides support for G7 15-day sensors and provides Live Activity / Dynamic Island / CarPlay for Loop (without need for a customization).

  • Customization Changes: two features that were previously customizations are included in Loop version 3.10.0
    • If you used either of these, remove them from your .github/workflow/build_loop.yml file or your browser build will fail
      • live_activity
      • dexcom_upload_readings

For more information: check out LoopDocs: Version, Releases page and LoopDocs: Setup, Features, Live Activity section.

Feature Branches for the Loop App

In addition to the released version of Loop (main) and the development version of Loop (dev), there are also 2 feature branches. These can be built using the same instructions as for the dev branch with either Browser Build or Mac-Xcode build.

  • For anyone using an iPhone 16 with DASH Atlas pods, consider using the feat/pod-keep-alive branch
  • For anyone wanting to test the new pumps supported by the Loop app, consider using the feat/dev-dana-medtrum branch

The feature branches are updated whenever the dev branch is updated. The Dana and Medtrum pump manager are under active test and so that branch is updated even more frequently than dev.

Please join zulipchat when using a feature branch.

See this Facebook post for some Q & A on this topic.

Browser Build: Confirm Status Monthly

We do not know why most people have their Loop automatic build action disabled by GitHub. If you use Loop and Browser Build, please continue to manually build the Loop app once a month.

Even though this is typically just the Loop app, we suggest you confirm once a month for every app you expect to build automatically; make sure a new build is available in your TestFlight.

Automatic builds are scheduled for the second Sunday of each month. We suggest you add a calendar reminder for the 15th of each month.

  • If you got a successful build email, just make sure the app shows up in TestFlight

  • If you did not get a successful build email, then do the manual build (only 5 clicks that can be done on your phone or in any browser)

Browser Build: Loop and LoopCaregiver Apps

As mentioned above, you will probably need to build the Loop app manually every month.

The LoopCaregiver app requires a manual build to get the automatic build started again.

  • This is because the developers allowed more than 60 days to elapse between updates to the repository

  • We do not plan to allow repositories to get stale, but it can happen. Just check monthly to find out the status for your apps.

Apple Recommendations

Update Phone iOS

Apple recommends that you update to iOS 26.2.

  • If your phone is older than iPhone 11
    • Apple recommends updating to iOS 18.7.3
    • Loop and Learn recommends you get a new phone as soon as possible

Links to Apple Support Information:

Reminder about Updating iOS

We recommend you wait for an all-clear from the Open-Source mentors before accepting a major update, for example from iOS 18 to iOS 26. But that doesn't mean wait forever.

It's fine to upgrade to iOS 26.2; in fact, updating to iOS 26.2 is the only option offered for phones newer than iPhone 11. There are important security updates, so do the update soon.

Update Loop before taking your phone to iOS 26 from iOS 18

  • Versions of Loop older than v3.8.2 exhibited a variety of user interface issues with iOS 26

For minor updates, like 26.1 to 26.1.1, you don't need to wait - just accept the update when convenient. When you update your phone's operating system, always be awake and aware. As soon as the update completes and your phone reboots, make sure your OS-AID is operating properly.

Mobile Phone Security: Reboot phone weekly

United States NSA Advisory

"The National Security Agency (NSA) has recommended that all iPhone and Android users restart their devices at least once a week. This guidance is part of a broader set of best practices to enhance mobile device security and protect users from potential cyber threats.

The advisory, detailed in a document released by the NSA, underscores the importance of regular device reboots as a simple yet effective measure to mitigate the risk of cyberattacks. The NSA’s guidance comes amid growing concerns over the increasing sophistication of cyber threats targeting mobile devices."

Trio Talk

A Trio user asked: "Why does Trio forecast a very high glucose when carbs are entered?"

Our expert says: Trio is not telling you what will happen. It’s telling you what it will respond to.

And, as we know, if glucose is forecasted to be high, Trio will bolus based on user settings to reduce the forecasted glucose.

Yes - the same answer is true for the Loop app and pretty much any AID system.

Developer Updates- Exciting News!

  1. Tandem Mobi is in open beta testing for AAPS
  2. The rewrite of Nightscout (called Nocturne) is making progress. We shared about this project in the 20 Dec 2025 edition of News from Loop and Learn.

DASH Atlas Pod Issues

German, and now American, loopers are encountering failed Atlas pods.

Our team has determined that these are pod errors. The lot in this post might have marginal batteries, which will be more likely to cause a 3rd day issue when used with OS-AID. If you will be traveling and are using LOT PD1K10112531, take even more extras than you otherwise would for the trip, and a way to inject insulin if an error happens at an inconvenient time.

Note - these pod faults are not related to the iPhone 16 problem with Atlas pods.

OS-AID in the Literature:

This review article was just published in Diabetologia and includes mention of Trio. Please have a read and then take a moment and send it to your endo provider!

"Fully closed‑loop systems: can people with type 1 diabetes just do it? Insights from open‑source systems" by Rayhan Lal, Katarina Braune, Dana M. Lewis, Lenka Petruzelkova, Martin de Bock, and Sufyan Hussain.

Bluetooth Tracking Devices

AirTags, Tiles and other Bluetooth tracking devices can really save the day! Do you use them? Here’s an article in Popular Mechanics describing their five favorite Bluetooth trackers for 2026. You can also search online for more options and good deals.

Urge the U.S. House to Support T1D Research Funding

The Special Diabetes Program (SDP) funds critical research that has improved lives and moves us closer to cures for T1D. Urge your U.S. Representative to support its long-term renewal!

Funding for the Special Diabetes Program (SDP) expires on January 30—and timely action is needed now to renew it.

Since its inception in 1997, the SDP has provided critical funding for efforts to prevent, treat, and ultimately cure type 1 diabetes (T1D). The SDP has yielded more than $50 billion in Federal healthcare savings through major innovations for the T1D community. Last fall, our Breakthrough T1D community and advocates across the country took action to extend temporary funding for the SDP. Now, we have the opportunity to ensure that Congress enacts a longer-term extension of the SDP so that critical research progress continues. Urge Congress to support the bipartisan, multi-year renewal of the Special Diabetes Program today!

SDP funding has directly advanced so many life-changing T1D breakthroughs, including automated insulin delivery systems, the first disease-modifying therapy to delay T1D onset, and many more- and with the promise of cell therapies on the horizon, continued research funding is crucial to accelerating our pathway to cures. Take action today to ensure that funding for the SDP remains strong. Thank you for making your voice heard and supporting our mission. https://www.breakthrought1d.org/advocacy/

Facebook Q&A