Dexcom Clarity vs Tandem t
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dexcom Clarity
This app provides diabetes management insights for continuous glucose monitoring (CGM) users. It helps identify glucose patterns and trends over time, aiding in better diabetes control and potentially increasing time in target glucose ranges. Users can track key metrics, share data with healthcare providers, and set personalized goals.
- Glucose pattern and trend analysis
- Time in range tracking
- Data sharing with healthcare professionals
- Setting Time in Range goals
- Report viewing, saving, printing, and emailing
- Notifications and email alerts
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Dexcom Clarity is a diabetes management application for CGM users. It provides relevant insights into users’ retrospective glucose values, patterns, and trends over time. Dexcom Clarity is an important part of your Dexcom CGM system. It can help you identify glucose patterns and, with your healthcare professional, determine the potential causes of those patterns. Dexcom Clarity users experience up to 15% increased time in range (70-180mg/dL) as compared to non-users.* Log in with your Dexcom account to: • Keep tabs on your time in range, patterns and other key metrics. • Allow clinics to access to your data and reports to make appointments more efficient. • Set Time in Range goals. • Turn on daily or weekly notifications and emails. • View, save, print, and email all reports. • Connect to partner apps for more features and benefits. 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. 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. *Parker AS, Welsh J, Jimenez A, Walker T. Insights from big data (2): Benefits of self-guided retrospective review of continuous glucose monitoring reports. Diabetes Technol Ther. 2018;20(S1):A-27.
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.
- Deliver bolus from smartphone
- Discreet secondary pump display
- View pump data and notifications
- Wirelessly upload therapy data
- Smartphone language support
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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
Verdict
The clearest difference is rating: Dexcom Clarity at 4.6 against Tandem t's 3.1. Dexcom Clarity also leads on chart position (#171 vs unranked) and ratings volume (13K vs 2.1K). On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Dexcom Clarity holds the better App Store score, 4.6 against 3.1. That said, the two scores are not equally well evidenced: Dexcom Clarity has 13K ratings behind it against 2.1K, so its average is the more settled of the two. Written reviews point the same way: 46% of Dexcom Clarity's written reviews are positive against 37% of Tandem t's.
Dexcom Clarity ships an update every 3 months, Tandem t every 2 months. Both last shipped on September 24, 2026.
| Parameter | Dexcom Clarity | Tandem t |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (13K ratings) — better | 3.1 (2.1K ratings) |
| Positive reviews | 45.9% of reviews — better | 37.4% of reviews |
| Number of ratings | 13K — better | 2.1K |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #171 — better | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 36 MB | 157 MB |
| Age rating | 4+ | 4+ |
| Developer | Dexcom | Tandem Diabetes Care Inc. |
Customer experience
Dexcom Clarity
Tandem t
User reviews
Dexcom Clarity
From 13K App Store ratingsWhat we love
- 🚀 Provides great insight
- 📊 Helpful reports and data
- 💯 Life-changing device
- 🔍 Detailed glucose tracking
- 🤝 Integrates with healthcare providers
Room to improve
- 🐛 Connectivity issues
- 🔒 Login problems
- 📉 Unreliable sensor readings
- 🚫 Doesn't work internationally
- 📱 Poor iPad support
Tandem t
From 2.1K App Store ratingsWhat 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 Clarity
Reported bugs
4 issues- Reports not updating
- Clarity app crashing
- Sensor calibration issues
- Data not syncing between apps
Requested features
5 requests- Ability to add personal notes
- Customizable report formatting
- More detailed data export options
- Ability to adjust graph scales
- Display daily high/low/average glucose
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
Dexcom Clarity
No in-app purchases
Tandem t
No in-app purchases







