The Spanish Agency for Medicines and Medical Devices (AEMPS) has issued a significant advisory regarding the Dexcom G6 app for iOS after confirming an issue in versions 1.11.2 and 1.12.0 that may cause outdated glucose data to be displayed instead of the latest available glucose reading. This situation, if left undetected, can lead to inappropriate treatment decisions with a direct impact on clinical safety, particularly at risk for those who rely on this real-time measurement. Health Ministry warns of outdated readings on Dexcom G6 iOS and urges swift action.
We're talking about an app that integrates the Dexcom G6 Continuous Glucose Monitoring (CGM) system, along with a sensor, a transmitter, and, if applicable, a dedicated receiver. It's indicated for people over two years of age and designed to make therapeutic decisions without routine capillary punctures. The company has begun distributing a warning note to patients, caregivers, and professionals to explain the error and the steps to follow, prioritizing immediate updating to the latest version available on the App Store. The central recommendation is to update the app and exercise extreme caution until confirming that the data is refreshed correctly..
The official communication frames this notice within the category of medical devices, safety (AEMPS reference: PS, 53/2025). This is a safety warning about a medical device for everyday use in diabetes..
What exactly has been detected
The manufacturer, Dexcom, Inc. (USA), reported to the Spanish Agency for Medical Information (AEMPS) an error where the Dexcom G6 app for iOS may stop displaying the most recent estimated value and instead retain a previous reading on the screen. If the user doesn't notice that the data is "frozen," they may misinterpret their blood sugar status and incorrectly adjust their treatment. The error causes the app to display a previous value and not the last one collected by the sensor..
This anomalous behavior affects versions 1.11.2 and 1.12.0 of the app (also identified as SW11585 and SW11586). The AEMPS emphasizes that the main risk is clinical: decisions based on outdated information that can prevent the timely detection of hypoglycemia and hyperglycemia, or lead to their inadequate management. The danger lies in making decisions with data that is not current..
The agency also emphasizes a basic principle of system use: interpretation should not be based on a single reading, but rather on trends and the set of accumulated sensor values over time. This approach reduces the possibility of errors due to single anomalies or refresh failures. Looking at the trend and history is key to making a safe decision..
Affected versions and scope of the problem
According to information provided to the Ministry of Health, the incident is limited to versions 1.11.2 and 1.12.0 of the Dexcom G6 for iOS, corresponding to software components SW11585 and SW11586. In these versions, the app may not behave as designed, resulting in the most recent value not being displayed on the screen in certain circumstances. iOS versions 1.11.2 and 1.12.0 are involved in the warning..
The company has announced that these older versions stopped working properly and were no longer available as of September 15, 2025, forcing users to upgrade to later versions. Dexcom also claims to have resolved the display delay in an update released in July 2025 and estimates the extent of the issue at approximately 1,4% of Dexcom G6 users on iOS worldwide. Dexcom estimates the incidence at 1,4% and claims it was resolved in a later version..
It's worth noting that some specialized media outlets report that the manufacturer initially did not provide full details about the number of affected individuals, the technical causes, or measures to prevent recurrences, underscoring the importance of transparent communications regarding digital health products. Transparency and risk management in digital health are under scrutiny..
Chronology and current situation in Spain
Dexcom reported the issue to the AEMPS (Spanish Agency for Medical Information), which issued the alert and disseminated it nationally. The affected versions stopped working properly as of September 15, 2025, and can no longer be used. The app is still available in the Apple App Store, but the latest version, which contains the fix for the refresh behavior, must be installed. From September 15, 2025, it is no longer permitted to continue with versions 1.11.2 and 1.12.0..
In practice, users should locate the company's notification within their app and click the "Update App" option to access the App Store and complete the installation. According to reports, a later version (e.g., 1.13.0) is already available, and it is recommended that users upgrade to it immediately. The shortest way is to go to the App Store and update to the latest stable version..
Regarding platforms, the described flaw has been observed on iOS for the indicated versions. Some media outlets report that this same problem has not been observed on Android for these specific versions, although the AEMPS (Spanish Agency for Industrial Engineering) has reported other brand issues involving Android (see below). The outdated data incident is limited to iOS, but there are other alerts in the ecosystem..
Clinical impact and risk scenarios
The main risk is therapeutic: a previous value can lead people to believe that glucose is still within a range that has actually changed, delaying or preventing a timely response. Episodes of hypoglycemia (low glucose) or hyperglycemia (high glucose) could thus go unnoticed or be insufficiently or incorrectly treated. Decisions based on “old” data can lead to serious management errors..
This not only affects acute events; it can also impair medium-term metabolic control, especially in people who adjust their insulin or other medications based on continuous monitoring. The more the user relies on instantaneous data and less on trends, the greater the potential impact of this failure. Overall glycemic control may be compromised by blind reliance on a single reading..
Who is affected
The Dexcom G6 system is authorized for use by individuals ages two and older and consists of a sensor, transmitter, receiver, and mobile app. The advisory affects users of the Dexcom G6 app on iOS using versions 1.11.2 or 1.12.0, as well as those who rely on that data for third-party care (caregivers), and professionals who supervise their use. Patients, caregivers and healthcare professionals must be informed and act.
This profile includes both users with type 1 diabetes and other clinical situations where CGM is used to optimize glycemic control, always under the corresponding medical indication. The scope is significant as it is a widely implemented system..
What patients and caregivers should do
The AEMPS and the company propose specific actions aimed at restoring system reliability and minimizing any therapeutic risks while the software is updated. Following the official update steps is a priority.:
- Check if you've received the Dexcom notification note within the Dexcom G6 iOS app. If it doesn't appear, contact the company to request it. It is important to confirm that you have received the communication.
- Update the app to the latest version available. Versions 1.11.2 and 1.12.0 were discontinued on September 15, 2025. In the app, tap "Update App" to go to the Apple App Store, install the current version, and open the updated app. Refresh eliminates the erroneous refresh behavior.
- Until the update is complete, exercise extreme caution: don't base decisions on a single value; review the trend and, if symptoms consistent with hypoglycemia or hyperglycemia occur, confirm with a capillary measurement. If in doubt, confirm with capillary blood glucose.
- If you need help, please contact Dexcom Support or visit the support website. Technical support is available to accompany you throughout the process..
Instructions for healthcare professionals
Clinical teams should proactively review the app's status and installed version with their patients and inform them of the alert. Providing the company's official notice and verifying the update are key steps to addressing residual risk. Clinical verification of the update is a priority task.
- Please notify Dexcom G6 users running iOS versions 1.11.2 or 1.12.0 of the detected error and provide them with the notification. Patient information is essential.
- Please expressly state that they should upgrade to a later version, since the affected versions will no longer function properly after September 15, 2025. The update is not optional in this case..
Furthermore, it is important to reinforce education on trend interpretation and not relying on a single instantaneous reading, emphasizing the usefulness of capillary confirmations if there are discordant signs or symptoms. Educating on trend-based usage reduces the risk of errors.
About the Dexcom G6 System and Best Practices for Interpretation
The Dexcom G6 is a CGM system that measures glucose in interstitial fluid and is designed to replace routine capillary blood glucose monitoring for therapeutic decision-making. The ecosystem includes a sensor, transmitter, receiver, and mobile app, and enables continuous monitoring with alarms and trends. It is a system designed for real-time decisions.
The AEMPS reminds us that the safe way to interpret results is through trends and accumulated readings, not through a single piece of data. This is especially important if any anomaly is displayed in the app, or if you suspect the screen hasn't been updated. Prioritize the trend and check if something doesn't fit.
Using the system correctly promotes early detection of hypoglycemia and hyperglycemia and improves day-to-day management when the technology is working as intended. In software failure environments, caution and additional verification make the difference. Responsible use mitigates the effects of one-off failures.
Other related incidents reported by AEMPS
In parallel, the Spanish Agency for Health and Safety (AEMPS) has highlighted in another advisory an issue with certain glucose monitoring apps from the brand for iOS and Android in which the "sensor failure" alert may not be issued. In this scenario, the user may not realize that the monitoring is not working, with the corresponding risk of not detecting hypoglycemia or hyperglycemia. There are additional communications that also affect Android in a different context..
While this is a separate incident from the outdated readings described here for iOS 1.11.2 and 1.12.0, it is worth keeping in mind as part of the overall MCG software security landscape. Each warning has its scope, but all require monitoring and updating..
Manufacturer's communication and transparency debate
Dexcom states that it proactively notified users and the Spanish Agency for Medical Research (AEMPS) when it became aware of the incident, that the display delay was corrected in the July 2025 update, and that versions 1.11.2 and 1.12.0 were no longer available as of September 15, 2025. It also estimates the reach at 1,4% of iOS users worldwide. The company maintains that the problem was resolved with an update..
Some specialized media have pointed out that the manufacturer's previous communications lacked details regarding the number of affected individuals, technical causes, and preventive measures, which raises a debate about transparency in digital health risk management. Regardless, the operative message remains: update the app and adopt good interpretation practices. Update, verify and maintain a prudent approach to use.
Furthermore, it's important to remember that journalistic information, even if based on official and professional sources, does not replace individual clinical judgment. If you have any personal health concerns, consult your healthcare team. If you have any questions about your treatment, consult your healthcare professional..
Contact and support information (Dexcom Spain)
Dexcom Spain
Aragón Avenue, 330
San Blas-Canillejas, 28022 Madrid
Technical Support Service: +34 900 42 32 92, https://www.dexcom.com/es-ES#contacto
Customer Service: +34 900 42 32 92, es.info@dexcom.com
www.dexcom.com. It has a toll-free telephone and web support channels..
Frequently Asked Questions
Is my phone affected? If you're using the Dexcom G6 on an iPhone running versions 1.11.2 or 1.12.0, please apply the update as soon as possible. This specific issue isn't described on Android, although other security communications from the brand exist. iOS 1.11.2 and 1.12.0 are the versions under notice.
Which version should I install? It's recommended to install the latest version published in the App Store (for example, version 1.13.0 has been reported). Update from the app itself using the "Update App" option, or search for "Dexcom G6" in the store and complete the installation. The latest available version contains the fix.
Should I stop using the system? No, but proceed with caution until you confirm the data is updating normally. Don't base clinical decisions on a single reading, and confirm with a capillary blood glucose test if you notice symptoms that don't match what the app shows. Use trends and confirm discrepancies.
What do I do if the notification doesn't appear in the app? Contact Dexcom Spain for the update note and guidance on how to update. You can also visit the official support website. Technical support can guide you step by step.
Does this issue affect Android? The outdated values bug has been described for iOS in the aforementioned versions. AEMPS (Spanish Agency for Mobile Applications), however, has reported another issue in which the "sensor failure" alert might not be displayed in certain iOS and Android apps. They are different notices, it is advisable to review both..
With all of the above, the course of action is clear: check if you are on one of the affected versions, update the app to the latest available, reinforce your trend-based interpretation habits, and if you notice anything unusual, check with a hair measurement and ask support or your healthcare team for help. Updating, monitoring trends and confirming when in doubt are the three pillars for using the system safely..