# Dexcom ONE — Continuous Glucose Monitoring > Continuous glucose monitoring system with smartphone app and customizable alerts. (iPhone/iPad app by DexCom, Inc..) - Source: https://appshunter.io/ios/app/dexcom-one/id1565426437 (this page in markdown: same URL + `.md`) - Developer: [DexCom, Inc.](https://appshunter.io/developer/457035738) - Category: Medical, Health & Fitness - Price: Free - Rating: 2.71/5 from 21 App Store ratings · 34 written reviews indexed - Age rating: 4+ - Requires: iOS 16.2 · 156 MB - Languages: American English, Bulgarian, Croatian, Dutch, Estonian, French (France), German (Germany), Greek, Italian, Latvian and 3 more - Released: 2022-05-19 - Data updated: 2026-08-27 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/dexcom-one/id1565426437/reviews.md ## What is Dexcom ONE? Monitoring your glucose level has never been simpler with the Dexcom ONE Continuous Glucose Monitoring System and mobile app. Dexcom ONE Continuous Glucose Monitoring System provides the user the ability to: - Know their glucose level with just a glance at a compatible smartphone† - Set optional and customizable high and low alerts - Use a discreet, simple and convenient device - Access glucose summary reports - Zero fingersticks* or calibrations Plus, Health app access so you can share retrospective glucose data with third party apps. Before you start making treatment decisions with Dexcom ONE, work with your healthcare provider to learn how. Learn more at dexcom.com This app is for use with the Dexcom ONE Continuous Glucose Monitoring System *If your glucose alerts and readings from the Dexcom ONE do not match symptoms or expectations, use a blood glucose meter to make diabetes treatment decisions †For a list of compatible devices, visit www.dexcom.com/compatibility ## Key features - Glucose level monitoring at a glance - Customizable high and low alerts - Discreet and convenient device - Glucose summary reports - Zero fingersticks or calibrations - Health app integration for data sharing ## Recent user reviews (10 of 34) All indexed reviews: https://appshunter.io/ios/app/dexcom-one/id1565426437/reviews.md ### 1/5 — Big *2025-11-29* Ça fait 40 fois que j’essaye de mettre mon pays France et ça ne me laisse le choix qu entre États Unis ou Espagne sur dexcom one+ ### 2/5 — Room for improvement *2025-01-07* The concept of the app is great and the CGM experience is life changing for diabetics. But the alarm system is so poor. Firstly, there is no critical alert system, meaning that the alerts will not override any phone settings. This is such an oversight. Libre system can do it, fall alerts can do it, there is no reason why this shouldn’t be a feature. Additionally the chime for a high glucose alert is too short - irrespective of which audio you set it to. It doesn’t alert for long enough to interrupt sleep or be heard through the bustle of busy life. There needs to be an option to extend the length of the chime. Finally, the low glucose alarm alert, whilst it does ring for long enough to alert you, it is very inconsistent. I’ve experienced the alert where it’s said I’m low, I’ve handled it, but then 1 hour later, I’ve gone back to check, but it’s fallen even lower and not re alerted or I just don’t get an alert. For a system which takes 2 hours to calibrate, I would expect more accuracy within the system. **Developer response:** We're sorry to hear that, thanks for letting us know about this issue. Please call us on 0800 031 5763 (UK) or 1800 827 603 (ROI) and we’ll be able to help you out 💚 Alternatively you can fill a Product Support request and we will get back to you https://dexcom-intl.custhelp.com/app/support_request/ ### 3/5 — Mise à jour pour iPhone 16 *2024-10-09* Propriétaire depuis peu d’un nouvel iPhone 16, je ne peux plus utiliser le téléphone pour mesurer ma glycémie avec le Dexcom ONE. Y a-t-il une mise à jour de prévu bientôt ? ### 3/5 — A quand Dexcom Follow *2024-10-01* Dexcom follow existe pour le G6 mais pas le One? Pourquoi ne pas l’avoir créé pour le One? **Developer response:** Nous sommes désolés de l'apprendre. Veuillez contacter notre équipe d'assistance technique qui se fera un plaisir de vous aider à résoudre ce problème https://dexcom-intl.custhelp.com/app/support_request/ ### 3/5 — Dexcom trial *2024-09-07* I decided to give Dexcom a try as my Libre’s weren’t sticking to me. And although some things about the Dexcom are bit better. Like comfort. The app falls short. I cannot shut the app and have it do its thing in the background which at night I shut the app out of habit and lose a whole nights readings. Like who leaves apps open? We close them to save battery and this has to stay open. Which to me a really let down and annoyance. Also the time in target cannot be changed I liked to be a bit harder on myself and make the green smaller as imo 10 is a litttle high. But on Dexcom you cannot change that either. I at this moment in time will not make the swap because the app is letting it down imo! **Developer response:** We are sorry to hear that. Please contact our technical support team who will be happy to help you resolve this issue https://dexcom-intl.custhelp.com/app/support_request/ ### 1/5 — Pertes de signal & soucis d'appariements *2024-08-08* Soucis d'appariements non résolus avec cette version de l'application et l'iPhone. J'ai donc du passer à un récepteur Dexcom One pour palier au problème.. Je suis déçue ### 3/5 — Mise à jour *2024-08-03* Message régulièrement intempestif demandant une mise à jour de l'application alors que la dernière version est déjà installée... Pas de prise en compte du délai depuis la dernière consultation avant l'alerte glucose bas/élevé, qui oblige à re-consulter l'application... **Developer response:** Bonjour, merci d'avoir pris contact avec nous. Notre équipe d'experts est la mieux placée pour vous répondre. N'hésitez pas à nous appeler au 0800 031 5761. ### 2/5 — Bonne app mais défaillante *2024-07-26* Bonjour , j’ai l’application de le Dexcom one depuis maintenant 4 mois . Tout était parfait mais depuis deux semaines , l’application ne fonctionne plu . Obligé de patienter de longue minutes pour qu’elle daigne afficher ma glycémie . L’application reste figée sur l’accueil ou figée sur une valeur qui ne correspond pas pour ensuite se fermer toute seule . Messieurs les développeurs merci de corriger ces problème Cordialement ### 3/5 — Inconvénients de l'application *2024-07-23* Cette application doit être mise à jour de toute urgence, car elle a commencé à ralentir beaucoup et à perdre le signal 10 à 15 fois par jour. Je ne sais pas ce qui s'est passé, mais cela n'est jamais arrivé auparavant. Un autre gros inconvénient est que cette application n'est pas compatible avec la montre Apple Watch. ### 4/5 — Works well *2024-07-10* Works well despite all the poor reviews which I cannot understand. It occasionally loses contact with the iPhone, usually a distance issue and nothing to do with the technology. It does require recalibrating every few days, but is seldom far out. The advice to recheck an alarm reading with a blood test is sensible. The only thing missing for me is to be able to see my blood sugar reading on my Apple Watch which would be very useful. With the release of the ONE+ I hope the basic ONE remains available for a long time yet. ## Frequently asked questions about Dexcom ONE ### What is Dexcom ONE? Dexcom ONE is a continuous glucose monitoring system that works with a compatible smartphone app to help users track their glucose levels. It provides real-time data and customizable alerts. ### Does Dexcom ONE require fingersticks? No, the Dexcom ONE system is designed to provide glucose readings without the need for fingersticks or calibrations. However, if your readings do not match your symptoms, you should use a blood glucose meter. ### Can I share my glucose data with others using Dexcom ONE? Yes, Dexcom ONE offers Health app access, allowing you to share retrospective glucose data with third-party apps. This can be useful for sharing with healthcare providers or loved ones. ### What devices are compatible with Dexcom ONE? The app is compatible with compatible smartphones. For a comprehensive list of supported devices, please visit www.dexcom.com/compatibility. ### How often is Dexcom ONE updated? The latest version of Dexcom ONE is 1.8.1, which was last updated on September 5, 2024. Updates typically include performance improvements and bug fixes. ### What is the age rating for Dexcom ONE? Dexcom ONE has an age rating of 4+, making it suitable for users of all ages who require continuous glucose monitoring. ### Where can I learn more about using Dexcom ONE for treatment decisions? It is recommended to work with your healthcare provider to learn how to make treatment decisions using Dexcom ONE data. More information is also available at dexcom.com. ### Does Dexcom ONE have ads? No, Dexcom ONE does not contain advertisements. It is a free application designed for medical monitoring purposes. ## Version history (last 5 releases) ### 1.8.1 — 2024-09-05 The Dexcom ONE team consistently endeavors to enhance the app and improve the overall user experience, prioritizing safety and reliability. Starting with version 1.6 you can optionally provide a glucose reading to calibrate the sensor and enhance the accuracy of your readings. With each update, we not only introduce the latest features but also address various issues, including: • Performance enhancements aimed at improving usability. • Bug fixes to minimize crashes and enhance overall reliability. • User interface updates are designed to simplify understanding of the app’s functionality. Should you have any questions or comments, we invite you to explore our website at www.dexcom.com or reach out to us via email at appsupport@dexcom.com. For technical assistance, please contact our dedicated technical support team at dexcom.com or connect with your local Dexcom representative. ### 1.8.0 — 2024-08-22 The Dexcom ONE team consistently endeavors to enhance the app and improve the overall user experience, prioritizing safety and reliability. Starting with version 1.6 you can optionally provide a glucose reading to calibrate the sensor and enhance the accuracy of your readings. With each update, we not only introduce the latest features but also address various issues, including: • Performance enhancements aimed at improving usability. • Bug fixes to minimize crashes and enhance overall reliability. • User interface updates are designed to simplify understanding of the app’s functionality. Should you have any questions or comments, we invite you to explore our website at www.dexcom.com or reach out to us via email at appsupport@dexcom.com. For technical assistance, please contact our dedicated technical support team at dexcom.com or connect with your local Dexcom representative. ### 1.7.1 — 2024-06-24 The Dexcom ONE team consistently endeavors to enhance the app and improve the overall user experience, prioritizing safety and reliability. Starting with version 1.6 you can optionally provide a glucose reading to calibrate the sensor and enhance the accuracy of your readings. With each update, we not only introduce the latest features but also address various issues, including: • Performance enhancements aimed at improving usability. • Bug fixes to minimize crashes and enhance overall reliability. • User interface updates are designed to simplify understanding of the app’s functionality. Should you have any questions or comments, we invite you to explore our website at www.dexcom.com or reach out to us via email at appsupport@dexcom.com. For technical assistance, please contact our dedicated technical support team at dexcom.com or connect with your local Dexcom representative. ### 1.7.0 — 2024-05-29 The Dexcom ONE team consistently endeavors to enhance the app and improve the overall user experience, prioritizing safety and reliability. Starting with version 1.6 you can optionally provide a glucose reading to calibrate the sensor and enhance the accuracy of your readings. With each update, we not only introduce the latest features but also address various issues, including: • Performance enhancements aimed at improving usability. • Bug fixes to minimize crashes and enhance overall reliability. • User interface updates are designed to simplify understanding of the app’s functionality. Should you have any questions or comments, we invite you to explore our website at www.dexcom.com or reach out to us via email at appsupport@dexcom.com. For technical assistance, please contact our dedicated technical support team at dexcom.com or connect with your local Dexcom representative. ### 1.6.1 — 2024-02-22 The Dexcom ONE team consistently endeavors to enhance the app and improve the overall user experience, prioritizing safety and reliability. Starting with version 1.6 you can optionally provide a glucose reading to calibrate the sensor and enhance the accuracy of your readings. With each update, we not only introduce the latest features but also address various issues, including: • Performance enhancements aimed at improving usability. • Bug fixes to minimize crashes and enhance overall reliability. • User interface updates are designed to simplify understanding of the app’s functionality. Should you have any questions or comments, we invite you to explore our website at www.dexcom.com or reach out to us via email at appsupport@dexcom.com. For technical assistance, please contact our dedicated technical support team at dexcom.com or connect with your local Dexcom representative. ## More apps by DexCom, Inc. - [Dexcom Follow (US)](https://appshunter.io/ios/app/dexcom-follow-us/id649569564) - [Dexcom Clarity](https://appshunter.io/ios/app/dexcom-clarity/id1019225730) - [Dexcom G6](https://appshunter.io/ios/app/dexcom-g6/id1209262925) - [Dexcom G6 Simulator](https://appshunter.io/ios/app/dexcom-g6-simulator/id1352389740) - [Dexcom G6 mmol/L DXCM1](https://appshunter.io/ios/app/dexcom-g6-mmoll-dxcm1/id1380943734) - [Dexcom G6 mg/dL DXCM2](https://appshunter.io/ios/app/dexcom-g6-mgdl-dxcm2/id1381463856) All apps by DexCom, Inc.: https://appshunter.io/developer/457035738 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*