I saw where Tandem was ok, but not Dexcom. I took one for the team and did the upgrade. T:Connect Mobile, Decom and Clarity work fine. When I opened the Decom app there was a message how they were working on 18, but the app works fine.
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I did like @CarlosLuis, though I wasn’t really thinking of compatibility with Trio, my G7, or other apps compatibility. Probably a bit of a risk, but I’ve pretty much taken the route of .x iOS versions without stated major upgrades present doubtful impact to software; I do hold off a bit for x. upgrades for a while to see if reported issues/compatabilities arise with any software, though I don’t follow the LnL suggestion of waiting for x.1 version. I’ve seen no issues today with either Trio, G7, LoopFollow, or other apps on my iPhone 14 w/ iOS 18.2. As usual, YDMV; I’m NOT saying there “won’t” be any impacts or its OK to install, it’s your choice and your risk.
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@CarlosLuis and @TomH,
I don’t know if you both have this luxury, but my wife also has an iPhone. 
So I always test things out on hers before I upgrade mine.
Don’t know if Tandem lets you do that, but you can do it with Dex and Loop.
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Aren’t you supposed to wait to download new iOS versions until Dexcom, Tandem etc have done all their regression testing? Per Tandem’s instructions, I have my iPhone set not to download new iOS versions for my Mobi pump until I get the ok from them
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I checked Tandem and iOS 18 was approved but got no notification. Dexcom wasn’t approved but I thought what the Hell. Both apps work, although I got a one time page from Dexcom that they were working on it.
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@funk I started out complying with Dexcom and Insulet recommendations, then discovered it took them literally years to come to a decision that an iPhone iOS upgrade released two years ago was ok. I decided to risk it and have not had any problems. For me, this was/is fine; for others it may not be and we each have to decide for ourselves.
I personally think there needs to be some priority assigned for by the manufacturer for the judgement to be made. The problem is there’s no incentive to do so, only to not do so. How long after an iOS or Android upgrade are we supposed to wait? A week, a month, a year, two years?
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I generally update the phone OS right away because I’m more concerned about getting hacked than about the Dexcom app failing to work. So far it’s worked fine. I acknowledge that I’m taking a chance, but it doesn’t feel like a big risk, because I keep good backups so I’d revert to the previous version of the OS if necessary. (It’s not easy, but it should possible.)
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When I worked in telecommunications our equipment was duplexed. When doing a software change one side is taken down while the other remains active. We would load the offline system, run some tests, if Ok swapped sides. The new load would run for a time. If AOK we would copy from the loaded side to the offline.
Sometimes it didn’t work so we would resort to the original load. We also had backup on and offsite if something catastrophic happened, like the active side failure.
I miss that ability to quickly restore when a load goes bad. This is why I distrust modern vehicles that are at risk of failure from simplex systems. For that matter 780 Max planes with one stall sensor.
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I have had one notification in recent weeks that an iOS version was updated for one of my devices. And it was not too long after the version became commercially available. It must have been from Tandem as I have not been on a pump very long and have been using Dexcom for years. I also did not know how to set this on my iPhone until recently so maybe that is why I never got notified by Dexcom for previous sw updates.
@funk While I’m a believer in not buying version one of just about anything, I’m otherwise an early adopter and advocate of tech, always have been. It works for me, but isn’t the best approach for many…and that’s OK.
For major updates…say iOS 17.x to 18.x…I hold off updating my iPhone for a couple of weeks to a month for “kinks” to get worked out and see any indications of issues with software, particularly for the devices I use on my iPhone. For my iPhone, I don’t have auto-download or -install set to “on.” I specifically look for CGM and pump issues (Dexcom G7 and Dash pods specifically) as well as for the AID software I use (I’ve used Loop, iAPS, and Trio). If no problems are indicated, I’ll go ahead update. The LoopandLearn group (https://www.loopandlearn.org) advocates waiting for a X.1 version before updating to a major release; that’s good advice for many, if not most, people.
For a x.1 or subsequent releases, I may wait a few to several days; if no problems, I’ll update fairly quickly. But, I don’t ignore the possibility of issues or conflicts. I regularly check this FUD group; various FaceBook groups for Loop, Trio, Dexcom, and Insulet; and people regularly post about issues with pumps, CGMs, and AID software. I regularly check the LoopZulipChat group (https://loop.zulipchat.com) and the Trio Discord group. I keep the PDMs (manufacturer controllers) for each device I use available; and keep iPhone TestFlight versions of the AID Loop, Trio, Nightscout, and LoopFollow apps available for download and install on both my and my wife’s iPhones. If all else fails, I have Novolog and Lantus pens for MDI use. Backups for the backups!
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