diaTribe’s Julie Heverly had the opportunity to try the new Tandem mobile app, which allows users to administer insulin boluses directly from their smartphones. Here’s her take on the process and app.
I have been waiting almost 20 years for this! It’s finally here and it’s living up to my expectations!
In 2002, four years after my diagnosis, I got my first insulin pump, a Medtronic Minimed.
As someone who had a fear of needles (I passed out at the mall when I got my ears pierced at 16 years old), I was relieved not to have to manage my diabetes with six-plus daily injections anymore. The new technology meant only one needle every three days, and ever since, I vowed I’d never return to multiple daily injections.
My insulin pump was welcomed and wonderful, but it did create a question I had not expected: where to wear the pump. At the time, most corporate attire for women consisted of dresses and skirts that did not have pockets. So, I had to get creative.
I remember trying various items that were available at the time – a thigh garter with a pocket, a calf sleeve, and a cami with a sewn in pocket. None of these worked; on the walk from my car to my office, the pump fell out of those contraptions more times than I could count. There was only one place that was safe for this life saving device: my bra. So for the better part of the last two decades, that’s where I’ve kept it.
However, when you are 25 years old, trying to build a career, and have the opportunity to have lunch with Larry Rockefeller IV or Barbara Bush, there is nothing more mortifying than reaching into your bra and pulling anything out. So I didn’t. I would wait until after lunch meetings and go to the restroom to take my insulin. I wish I had known about the importance of bolusing before meals at the time; my glucose levels and A1C were impacted by these delays in insulin dosages.
Even after I left corporate America and joined the diabetes world, I was never comfortable with the shock to others when pulling my insulin pump out of my bra. Most days, I bolused in private, pre- or post-public meals. At conferences or all-day meetings, I would have to wear certain, special outfits that did have pockets or conventional access to my pump. Thankfully, fashion evolves, and including pockets in women’s attire benefited those of us who have to carry medical devices. But it’s still not an easy or perfect situation. Until now!
In February 2022, the FDA cleared Tandem’s updated t:connect app to allow users to deliver or cancel boluses directly from their phones. On June 15, scrolling through social media while treating a low in the middle of the night, I saw that Tandem was starting a limited launch of the new phone app with the mobile bolus feature, and I immediately signed up.
The ability to bolus from the same device I shop, bank, and monitor my glucose from has been on my wish list for the last 20 years. The next morning, I received an email stating that I had been accepted into the early launch and that I would be getting more information in “the coming weeks.” A week later, I started checking my emails and junk mail folder every day.
After several weeks of anticipation, reading everything I could find about the launch from people who were sharing, I finally got an email notification on July 13 from Tandem. The software update for my t:slim X2 pump was available! I took my lunch break and started the required training.
Things to know about mobile bolusing and the t:connect app
There are two self-paced training sessions. The first takes less than 10 minutes and focuses on a few updates to the pump. The second training is 30-45 minutes long and goes through the mobile app to bolus insulin. The training walks you through the updated screens on the phone and pump, BEFORE you get them on your devices. You can’t get the update until you finish the training (I saw a lot of chatter about this on social media). However, you can access the training and guide afterwards if you still have questions. Both training sessions have quizzes at the end, and you have to answer every question correctly to get your update link.
Tandem suggested downloading your pump’s data to t:connect BEFORE installing the new software. For pumpers who do not frequently upload this data, this can be a lengthy process due to the sheer amount of information that is being transferred. If you do upload regularly, it should only take a couple of minutes.
The update, just like the update to Tandem’s automated insulin delivery system, Control IQ, requires removing the cartridge and restarting the pump and CGM. I was grateful to have had a full cartridge when my update came through. I did have to give the pump the illusion of re-priming my tubing and cannula. As a reminder, 10 units of insulin through the tubing is the minimum for a restart. The training reminds you, and so will I, to make sure you are disconnected so you don’t get all that extra insulin in your system. I also found it handy to have my current CGM 4-digit code available to me, as after the update, I needed to activate the CGM function.
I already had the t:connect app on my phone, which is available for both iOS and Android. The bolus feature was not previously in the app, but as soon as I completed the training and updated the app, it appeared on my screen!
The bolusing action is protected by Face ID or a password.
I’ve been using it for the past several days. It’s easy and convenient. As shown below, the mobile app displays current CGM reading and a 3-hour graph, insulin on board and Time In Range metrics for the past 24 hours.
When bolusing, you have the option to include the correction dose, input your carbs, and/or override units manually, if you need to. The only features that I use often on my pump screen that the mobile app does not have are the carb calculator, the extended bolus feature, and the out of range alarm silencer.
Since the update, I have not bolused from my pump once. The mobile app is convenient and easy – attached to my phone.
Being able to remotely manage my diabetes is even better than I could have imagined. I’m already looking at high neck and turtleneck sweater dresses that I have not been able to wear for the past 20 years because I wouldn’t have access to my pump for bolusing.
Unfortunately, out of range (above or below) alarms still need to be silenced on the pump. This is a bit of a bummer, but I use it as motivation to bolus early and stay in range, so I don’t have to clear any alarms.
A few days after the download, I had the chance to provide feedback, and I shared all of this in the Tandem survey. Perhaps the full launch will include some of the items mentioned above. One can always hope.
I’m grateful to Tandem for this update and am thrilled to be part of the limited launch. According to Tandem’s website, the updated app will become available later this summer. While the change may seem small to some, it is big to others. I can’t wait for more people to get the update and benefit from its ease and convenience.