Tandem t:slim® mobile app

1.7
3.82K reviews
100K+
Downloads
Content rating
Everyone
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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.
Updated on
Apr 12, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Personal info, Health and fitness and 3 others
This app may collect these data types
Personal info and Health and fitness
Data isn’t encrypted
You can request that data be deleted

Ratings and reviews

1.7
3.77K reviews
Dawn Buchert
February 20, 2026
This app hates Android's. You better be married/glued to your phone for this app to stay connected. If you are more than 10 feet from the phone its disconnected. When glued to phone it works great for T-slim. I wouldn't recommend this app to Android users. The only trick to maybe let it connect is to turn off your phone and back on if you haven't been disconnected more than 5 or 10 minutes.
15 people found this review helpful
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Tandem Diabetes Care, Inc.
February 20, 2026
We appreciate you letting us know about your experience. We have escalated these details to our Software Support team for further investigation. If you'd like to contact our team directly, please call (877) 801- 6901, 24/7
Chad Hayashi
July 24, 2025
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.
111 people found this review helpful
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Tandem Diabetes Care, Inc.
July 17, 2025
We appreciate you letting us know about your experience here. We have reported this to our Technical Support team. They will probably be reaching out for more details. As a reminder, our Software Support team can be reached at (877) 801- 6901, anytime.
Michael Steinberg
August 31, 2025
The disconnects are still happening almost every time I return to the app. Are any app updates coming to fix this? ----- Since I've updated to Android 16, I am now experiencing constant disconnects from my pump. It's very easily fixed by turning Bluetooth off and right back on, but it shouldn't happen. This never happened for me until the OS update. Note that I do not talk on the phone for support. You should provide tech support via email as that's the only way I will communicate.
198 people found this review helpful
Did you find this helpful?
Tandem Diabetes Care, Inc.
April 30, 2025
We appreciate you letting us know about your experience, Michael. We have escalated these details to our Software Support team for further investigation. If you'd like to contact our team directly, please call (877) 801- 6901, 24/7

What’s new

Overall app performance updates