Tandem t:slim Mobile App

Tandem t:slim Mobile App

t:slim X2 insulin pump

2.1K ratings
369 reviews
Free

Details

  • Released
  • Updated
  • May 4, 2026
  • August 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

2.13.1

August 27, 2026

Overall app performance updates

User reviews

Bluetooth connection lost

This latest update has stopped the app working. The Bluetooth connection doesn’t stay connected for more than 2 minutes. Please fix

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?”
Update 2: Connection issues GALORE with the newest app update. Can’t y’all get /anything/ right?
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Won’t stay connected

Won’t stay connected on latest update. App is unusable.

2.13.1 “critical alerts”

Update prompts you to accept critical alerts, now the whole app doesn’t work, even if it did, if this app only works with critical alerts now I will switch cgms, making critical alerts non optional makes you feel like a ticking time bomb around your friends and is not needed when you’ve had diabetes for multiple decades, let people choose this is ridiculous
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Suggestion

I wish that this app would connect to Siri, so that while I’m driving by myself or too busy to manually bolus I can tell her to do it for me. This would be a huge lifesaver and such an amazing feature. I feel that there are also so many other people besides me that would benefit from this!

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.