Tandem t:slim Mobile App

Tandem t:slim Mobile App

t:slim X2 insulin pump

36 ratings
320 reviews
Free

Details

  • Released
  • Updated
  • May 4, 2026
  • April 27, 2026
Tandem t:slim Mobile App screenshot #1 for iPhone
Tandem t:slim Mobile App screenshot #2 for iPhone
Tandem t:slim Mobile App screenshot #3 for iPhone
Tandem t:slim Mobile App screenshot #4 for iPhone
Tandem t:slim Mobile App screenshot #5 for iPhone
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About

This app acts as a smartphone companion for a specific insulin pump, allowing users to deliver insulin doses and view pump data remotely. It provides discreet access to essential information and notifications, enhancing convenience for pump users.

Deliver bolus from smartphone
Discreet secondary pump display
View pump data and notifications
Wirelessly upload therapy data
Smartphone language support
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What users say

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What's New in Tandem t

2.12.1

April 27, 2026

Overall app performance updates

User reviews

The Software

Is there a way that you the builders of the app can help improve the experience of this app on IOS 27 software? Because I’ve tried to use the insulin pump amount function and it doesn’t work and I’m getting a new iPhone tomorrow and would like to be ready as soon as possible. Pls and thank you

Genuinely impressed

Works super well and there is almost no delay when bolusing.

It seems to reconnect to the pump everytime I open the app but it take about 5 seconds so I don't mind it.

One suggestion would be to have the bg numbers appear higher or lower instead of directly on the dots of the graph. As it is now its hard to see the tendency as the green "star" covers multiple dots especially if you checked it multiple times.
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Yes

I like the app but would REALLY like to be able to see the date/time the cartridge was last changed like you can see when your CGM was last changed please! It would be so much more convenient than it is now to have to go into the pump and go through a bunch of screens to see when you last replaced the cartridge.
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More customization

I just started an insulin pump, as a diabetic which is super cool! But the lack of features like setting your exercise or sleep schedule, or even turning on dark mode from inside the app is SUPER ANNOYING! I went with the X2 /specifically/ because I wouldn’t have to change it as often which is great but the fact that I have to activate sleep mode from the pump itself gets me annoyed. I shouldn’t have to dig my pump out from wherever I have it to activate sleep mode just so I can SLEEP! MOBI users get to active sleep and exercise from their app so why can’t X2 users? And NO, I don’t want to talk to anyone from the tech team tandem, I want you to update the app to have these features because I know you can!

Update: App QoL updates can include a built in calculator like the pump itself has and a way to activate activities from the app w/o needing to unlock the pump. Again, I don’t want to talk to the tech team, I want you to bring this review directly to them and ask “Is this possible for our diabetic patients?”
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Terrible

Randomly stopped accepting my libre 2 plus sensors with no prior warning and didn’t let me update the pump before to use the libre 3 plus sensor. Absolutely criminal. Now I’m stuck with a libre 2 plus sensor that won’t work. What a terrible company and product. Switching to another company and product asap. Unbelievable.
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Developer apps

User experience

🐞

Reported Bugs

4 issues

App crashes on launch

Bug

Pump battery draining rapidly

Bug

Glucose data not syncing properly

Bug

Repeated connection losses

Bug

Requested Features

5 requests

Add extended bolus capability

Feature

Allow clearing of pump alarms from app

Feature

Integrate with Apple Health/Watch

Feature

Expand data history and customization

Feature

Improve app stability and reliability

Feature

FAQ

What does the Tandem t:slim mobile app do?

The app serves as a smartphone companion for the t:slim X2 insulin pump. It allows users to deliver insulin boluses directly from their phone, view pump data, and receive notifications. It also offers a discreet secondary display for pump status and can wirelessly upload therapy data to the cloud.

What are the key features of the app?

Key features include the ability to deliver a bolus from your smartphone, use your phone as a discreet secondary display for the pump, view pump data and receive push notifications, and wirelessly upload pump therapy data to the cloud. The app also supports smartphone language settings.

Is the Tandem t:slim mobile app free to use?

Yes, the app is free to download and use. It is a companion app designed to work with the t:slim X2 insulin pump and does not have any in-app purchases or advertisements mentioned in its description.

What are the compatibility requirements for the app?

To use the app, you need a t:slim X2 insulin pump from Tandem Diabetes Care and a compatible smartphone. Additional restrictions apply, and users should refer to the t:slim X2 insulin pump user guide for a comprehensive list of warnings and precautions.

Can I dismiss alerts and alarms from the app?

No, you cannot dismiss alerts and alarms directly from the mobile app. You must dismiss them on the t:slim X2 insulin pump itself. Once an alert or alarm is dismissed on the pump, it will then disappear from the mobile app display.