Comparison

Dexcom G6 vs Tandem t

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Dexcom G6

Monitor your glucose levels in real-time with continuous glucose monitoring. Receive personalized alerts for high or low glucose, and share your data with loved ones. This app is designed for individuals managing diabetes with compatible CGM systems.

Highlights
  • Real-time glucose readings
  • Personalized trend alerts
  • Customizable alert schedules
  • Share glucose data with followers
  • Health app integration
  • Apple Watch app support
Features
Read full description

Only use this app if you have the Dexcom G6 or G6 Pro CGM Systems. Always know your glucose number and where it’s heading with the Dexcom G6 and G6 Pro Continuous Glucose Monitoring (CGM) Systems –indicated for diabetes treatment decisions with zero fingersticks and no calibration.* Before you start making treatment decisions with your G6 or G6 Pro, work with your healthcare provider to learn how. *Fingersticks required for diabetes management decisions if symptoms do not match readings. Always know your glucose number with just a quick glance at your compatible smartphone or smartwatch. For a list of compatible devices visit www.dexcom.com/compatibility. Dexcom G6 and G6 Pro provide real-time glucose readings for patients with type 1 or type 2 diabetes every five minutes. Dexcom G6 and G6 Pro are indicated for children, age 2 years and older. The Dexcom G6 and G6 Pro Systems provide personalized trend alerts on your smart device and let you see when your glucose levels are going too low, or too high, so you can better manage your diabetes. The Alert Schedule** feature lets you schedule and customize a second set of alerts. Custom alert sounds are available, including a Vibrate-Only option on the phone for glucose alerts. The only exception is the Urgent Low Alarm, which you can’t turn off. The Always Sound** setting, which is on by default, allows you to receive certain Dexcom CGM Alerts even if your phone sound is off, set to vibrate, or in Do Not Disturb mode. This allows you to silence calls or texts but still receive audible CGM Alarm and Alerts, including the Urgent Low Alarm, Low and High Glucose alerts, Urgent Low Soon Alert**, and Rise and Fall Rate alerts**. A Home screen icon shows you if your Alerts will sound or not. For safety, the Urgent Low Alarm and three alerts can’t be silenced: Transmitter Failed, Sensor Failed, and App Stopped. Other features: • Share** your glucose data with up to ten followers in real time. Followers can monitor your glucose data and trends in real time on their compatible smart device with the Dexcom Follow** app. Share and Follow functions require an internet connection • Health app access so you can share retrospective glucose data with third party apps • Today View widget allows you to view your glucose data on the lock screen of your smart device • Add a shortcut to Siri to run by asking Siri to read your current glucose value, using a custom phrase **Not available on Dexcom G6 Pro CGM System Apple Watch View your glucose information, trend graph, and alerts and alarm right from your wrist with the Dexcom G6 Apple Watch app. Watches require compatible smart device to use app. Customer Reviews This app store should not be used as your first point of contact to resolve technical or customer services issues. In order to protect your privacy and personal information, and promptly resolve any technical or customer services issues you are having with any Dexcom product, please contact 1-888-738-3646 or www.dexcom.com/tech-support. Dexcom is required to follow up with customers regarding product-related complaints. If Dexcom determines that your comment/complaint requires follow up, a technical support representative will attempt to contact you to gather more information regarding your comment/complaint. Dexcom is a registered trademark in the US.

About

Tandem t

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.

Highlights
  • Deliver bolus from smartphone
  • Discreet secondary pump display
  • View pump data and notifications
  • Wirelessly upload therapy data
  • Smartphone language support
Read full description

The Tandem t:slim mobile app, the companion app for your pump. Always consult a healthcare professional for information about how to manage diabetes. - 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 the 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.

Screenshots

Dexcom G64 screens
Tandem t4 screens

Verdict

The call

The clearest difference is update cadence: Tandem t at every 2 months against Dexcom G6's every 4 months. Dexcom G6's advantage is ratings volume (9.1K vs 2.2K). On price, rating, review sentiment and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.1 for Dexcom G6 against 3.1 for Tandem t. Both are backed by a comparable volume of ratings — 9.1K and 2.2K respectively. Written reviews are what separate them: 34% of Dexcom G6's written reviews are positive against 37% of Tandem t's.

UpkeepUpdate frequency

Dexcom G6 ships an update every 4 months, Tandem t every 2 months. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 8 level
Dexcom G6 versus Tandem t: the parameters behind the verdict, then further details
ParameterDexcom G6Tandem t
PriceFreeFree
Rating3.1 (9.1K ratings) — better3.1 (2.2K ratings)
Positive reviews34.1% of reviews36.7% of reviews — better
Number of ratings9.1K — better2.2K
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS18.618.0 — better
Further details — not scored
Size66 MB157 MB
Age rating4+4+
DeveloperDexCom, Inc.Tandem Diabetes Care, Inc.

Customer experience

Dexcom G6

All ratings9,014 ratings
Positive46.9%
Neutral12.9%
Negative40.2%
Written reviews293 reviews
Positive34.1%
Neutral12.6%
Negative53.2%

Tandem t

All ratings2,123 ratings
Positive44.8%
Neutral16.1%
Negative39.1%
Written reviews390 reviews
Positive36.7%
Neutral17.4%
Negative45.9%

User reviews

Dexcom G6

From 9.1K App Store ratings

What we love

  • 🚀 Continuous glucose monitoring
  • 📈 Helpful for managing diabetes
  • 🤝 Shares data with others
  • 🔋 Long-lasting sensor

Room to improve

  • 🔊 Overly loud alerts
  • 🔄 Frequent signal loss
  • 🤯 Inconsistent accuracy
  • 📱 App crashes and bugs
  • 🕰️ Short sensor lifespan

Tandem t

From 2.2K App Store ratings

What we love

  • 🚀 Convenient mobile bolus
  • 📊 Helpful data visualization
  • 🤳 Discreet pump management
  • 🔋 Reasonable battery impact
  • 🎉 Game-changing technology

Room to improve

  • 🔌 Frequent connection issues
  • 🕰️ Annoying time mismatch alerts
  • 🔒 Limited pump control
  • 🔍 Missing key features (extended bolus, alarms)
  • 🐛 Buggy and unstable at times

Bugs and requests

Dexcom G6

Reported bugs

3 issues
  • App unable to reconnect after signal loss
  • Calibration issues and errors
  • Notifications not working as expected

Requested features

4 requests
  • Add notes for carbs and exercise
  • Customizable alert settings
  • Improved Apple Watch integration
  • Dark mode option

Tandem t

Reported bugs

4 issues
  • App crashes on launch
  • Pump battery draining rapidly
  • Glucose data not syncing properly
  • Repeated connection losses

Requested features

5 requests
  • Add extended bolus capability
  • Allow clearing of pump alarms from app
  • Integrate with Apple Health/Watch
  • Expand data history and customization
  • Improve app stability and reliability

In-app purchases

None

Dexcom G6

No in-app purchases

None

Tandem t

No in-app purchases

Questions

Is Dexcom G6 free?
Dexcom G6 is free to download, with no in-app purchases.
Is Tandem t free?
Tandem t is free to download, with no in-app purchases.
Which has better reviews, Dexcom G6 or Tandem t?
Dexcom G6 is rated higher. Dexcom G6 averages 3.1 out of 5 from 9.1K ratings, while Tandem t averages 3.1 from 2.2K ratings.
Do Dexcom G6 or Tandem t have ads?
Neither Dexcom G6 nor Tandem t shows ads.
Which is updated more often, Dexcom G6 or Tandem t?
Dexcom G6 ships an update every 4 months, and Tandem t every 2 months. Most recently, Dexcom G6 was updated on November 1, 2026 and Tandem t on October 29, 2026.

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