Tandem t:slim® mobile app

Tandem Diabetes Care, Inc.

About this app

The Tandem t:slim mobile app, the companion app for your pump.

- Deliver a bolus from your smartphone*

- Serves as a discreet, secondary display for the pump†

- View pump data and receive push notifications directly on your smartphone‡

- Wirelessly upload pump therapy data to cloud†

Note: Units of measure on app may differ from those pictured above. Mobile app units of measure will match the paired t:slim X2 insulin pump.

ALWAYS READ THE LABEL AND FOLLOW THE DIRECTIONS FOR USE. The electronic instructions for use for the Tandem t:slim mobile app (Basic UDI-DI: 0850018992TF-0011603KR) can be accessed through the t:slim X2 user guide, available here: https://www.tandemdiabetes.com/support/resources/documents. Upon request, a printed copy of the user guide can be provided within 7 days at no additional cost.

If the language set on your smartphone is supported by the mobile app, then the mobile app will display in that language. If the language set on your smartphone is not supported by the mobile app, then the mobile app will display in English.

*Requires a t:slim X2 insulin pump from Tandem Diabetes Care and a compatible smartphone. Additional restrictions apply. Refer to the user guide for t:slim X2 insulin pump for a list of warnings and precautions.

†The information on the Tandem t:slim mobile app display may not be identical to the current status of your pump. Wireless uploads from the Tandem t:slim mobile app to the cloud-based Tandem Source platform require a compatible phone and an internet or wireless data connection. Uploads to the Tandem Source platform do not take place in real time and should not be relied upon by healthcare providers, pump users, or caregivers for remote patient monitoring. Standard carrier data rates may apply. ‡You cannot dismiss alerts and alarms from the app and must do so on the pump itself, but once an alert or alarm has been dismissed on the pump it will also disappear from the mobile app.

Ratings and reviews

I update my review about once a year, and this is still not a great app. If I move more than 5 feet from my phone, it loses Bluetooth connection and I can no longer bolus from my phone, nor see any readings at all. Turning the Bluetooth off and on again usually fixes this, so that's better than having to manually reconfigure the connection each time, but it's still enough of an issue to be frustrating as it is daily. The Dexcom app has no issue whatsoever with auto-reconnecting when in range.

I've fixed the issue of having to always force close and restart to get it to connect. Now I'm mostly concerned with the terrible range of the pump's connection to the Dexcom. That range is way too small. Is usually connected to one side of my stomach and sits in my pocket, and the cgm is attached to the other side. About 2 and a half feet. But at least the app is connected to the pump.

update 6/3/26 The last update finally fixed the connection issue. Does affect battery usage but it's manageable. App works fine. ** Cons: used 700mb of data in one day, and I only have 1 G, so have to turn off my data unless I need it away from wifi. Can't determine cause, but has happened the past 2 months. Constantly asking for login info. Sometimes just doesn't open. Force close and then open again sometimes helps, sometimes not. Has potential, but just not worth the hassle.

What’s new

• Overall app performance updates