No, I have not gone to the dark side … and this article is wildly techie.  But since we’re talking closed loop systems (yes, the hot topic in 2017, a great conversation starter!), this article is written by one of the really knowledgeable hackers/techies, looking at both systems. 

Thanks to Tim Street, a group member on FB Looped for the definitive piece on do-it-yourself loop systems, published 12/19/2016 on 


Having run and used Loop and OpenAPS side by side for the past three or so months, I felt it was time to compare what it feels like to live with them, and some of the things that you need to do, regardless of which option you elect to go with. I come out on the side of preferring OpenAPS, but using Loop when needing portability. You may have a different point of view.


It’s the numbers, silly…

The first thing that anyone dabbling in looping needs to consider is that you need to know your numbers. That means plenty of testing. And when I say testing, that’s basal testing, Insulin duration testing, I:C ratio testing and ISF testing. That means doing I:C and ISF at different times of day to confirm that you don’t get changes and therefore need to have them added differently.

Why’s this important? Well both Loop and OpenAPS work out your insulin adjustments using this data, and if it’s wrong, then both struggle to keep you in target and deliver a good result.

#Loop and #OpenAPS – living with both, the similarities and differences – let’s get down and dirty…

And if you want to “chat” with Tim, you can join the Looped group on Facebook.

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