Circular Ring Outage History

Started Apr 23, 2026, 01:40 AM UTC· resolved Apr 23, 2026, 07:39 AM UTC

1. identified Apr 23, 2026, 01:40 AM UTC

   Some users may currently be unable to sync and may see ES02 or ES03 errors when trying to upload data. This is linked to maintenance on one of our services, not to your ring or your data. Your ring and phone continue to work normally, and your health data is safely stored locally on your phone, so nothing is lost. Please retry when the alert has disappeared. Once our servers are back online, your data will automatically sync. You don’t need to do anything. Do not log out or uninstall the app, as this won’t help and could erase locally stored data. Thank you for your patience while we finish this maintenance with our provider.

2. resolved Apr 23, 2026, 07:39 AM UTC

   This incident has been resolved.

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Started Oct 20, 2025, 12:56 PM UTC· resolved Dec 29, 2025, 04:27 AM UTC

1. identified Oct 20, 2025, 12:56 PM UTC

   ⚙️ Server Stability Status During periods of high traffic, our servers may limit data processing to maintain stability for all users. This means that some data may appear partially after synchronization. 🔍 Symptoms You Might Notice If you experience one or more of the following issues, it may be due to temporary server load management: -Lack of data granularity — gaps or flat zones in your Activity Intensity graph or missing segments in the Activity Duration pie chart (found under the Energy Circle). -Missing metrics — sleep score, energy level or other related data not showing up after sync. -Lost steps or incomplete activity records. 🧘 What You Can Do You can synchronize data: - Daily. If you have more than 24 hours of data in your ring, it increases the chance of losing data. Please sync before going to bed and 1-2 hour after waking up. - During off-peak hours, i.e., not right after you wake up, because everyone synchronizes within a short timeframe. There’s nothing else you need to do on your side. 🚀 By End of December 2025 We’re shifting to an architecture where each user gets a dedicated processing calculation instance, so one user’s activity won’t affect another. This upgrade will enable Circular to support millions of users simultaneously, with 100% stability for everyone and faster score processing. 🔜 Update: Where We Stand Now This week, we began rolling out the new database to a small group of users and we monitored performance. The good news: the configuration is solid and working as expected. However, we identified a few code-level issues that need to be fixed before we can scale up. Our team is already working on those fixes, and if all goes well, we plan to switch all users to the new database next week. We're accelerating this transition because we know how important it is to restore the sync stability to everyone as quickly as possible. ⏯️ What This Means for You To make this switch as fast and restore the sync of today's data : We’ll move your past historical data in phases: 1) When switched to the new database, you may temporarily see an empty history in your app. 2) Later, we’ll then replay your data from the current month first, so your latest trends and leaderboard status reappear. 3) Again later, we’ll import your older historical data in the last step of the migration. Rest assured, we’ll notify you through the updates as each phase completes. 🔧Support & Debug Guide We've compiled an instant debug guide to help you troubleshoot most common issues. -App Crashes During Sync Go to My Ring > Factory Reset Remove the ring from your Bluetooth settings Put the ring on the charger and re-pair via the app -Data Missing or Inaccurate Open app > Menu > Settings > Self-Diagnostic Follow the steps with a white paper to recalibrate sensors -No Sleep Data If data shows up some days: we’re upgrading servers — try syncing in the morning & evening before bed -Bluetooth Connection Issues Disassociate ring in My Ring > Manage My Ring Kill the app, remove ring from Bluetooth settings, restart phone, and re-pair via the app -ECG Signal Issues Clean and lightly humidify your finger before measurement

2. monitoring Oct 24, 2025, 10:17 AM UTC

   A fix has been implemented and we are monitoring the results.

3. monitoring Dec 19, 2025, 09:44 AM UTC

   🔜 Update: Where We Stand Now This week, we began rolling out the new database to a small group of users and we monitored performance. The good news: the configuration is solid and working as expected. However, we identified a few code-level issues that need to be fixed before we can scale up. Our team is already working on those fixes, and if all goes well, we plan to switch all users to the new database next week. We're accelerating this transition because we know how important it is to restore the sync stability to everyone as quickly as possible. ⏯️ What This Means for You To make this switch as fast and restore the sync of today's data : We’ll move your past historical data in phases: 1) When switched to the new database, you may temporarily see an empty history in your app but the ring's data sync will be stable 2) Later, we’ll then replay your data from the current month first, so your latest trends and leaderboard status reappear. 3) Again later, we’ll import your older historical data in the last step of the migration. Rest assured, we’ll notify you through the updates as each phase completes. 🔧Support & Debug Guide We've compiled an instant debug guide to help you troubleshoot most common issues. -App Crashes During Sync Go to My Ring > Factory Reset Remove the ring from your Bluetooth settings Put the ring on the charger and re-pair via the app -Data Missing or Inaccurate Open app > Menu > Settings > Self-Diagnostic Follow the steps with a white paper to recalibrate sensors -No Sleep Data If data shows up some days: we’re upgrading servers — try syncing in the morning & evening before bed -Bluetooth Connection Issues Disassociate ring in My Ring > Manage My Ring Kill the app, remove ring from Bluetooth settings, restart phone, and re-pair via the app -ECG Signal Issues Clean and lightly humidify your finger before measurement

4. monitoring Dec 24, 2025, 02:45 AM UTC

   The new app version 28.36.0 has been published and is available on the store. The app has been adapted to support the new DataBase. We'll now start the deployment of the new DataBase as of 26/12/2025. To make this switch and restore the stability of new data as fast as possible: We’ll move your past historical data in phases: 1) NOW: When switched to the new database, you may temporarily see an empty history in your app. 2) Later, we’ll then replay your data from the current month first, so your latest trends and leaderboard status reappear. 3) Again later, we’ll import your older historical data in the last step of the migration. 🔧Support & Debug Guide We've compiled an instant debug guide to help you troubleshoot most common issues. -App Crashes During Sync Go to My Ring > Factory Reset Remove the ring from your Bluetooth settings Put the ring on the charger and re-pair via the app -Data Missing or Inaccurate Open app > Menu > Settings > Self-Diagnostic Follow the steps with a white paper to recalibrate sensors -No Sleep Data If data shows up some days: we’re upgrading servers — try syncing in the morning & evening before bed -Bluetooth Connection Issues Disassociate ring in My Ring > Manage My Ring Kill the app, remove ring from Bluetooth settings, restart phone, and re-pair via the app -ECG Signal Issues Clean and lightly humidify your finger before measurement

5. monitoring Dec 27, 2025, 11:45 AM UTC

   🚀 Server & Database Update – Good News! We’re happy to share that the new database has now been successfully deployed! 🎉 We’re currently replaying your scores from the past week, which means your data from the last week should soon be fully restored. 🔁 Note: Replaying scores is resource-intensive and may temporarily slow the app or sync process. We’re closely monitoring system performance under real-world usage to ensure everything stays stable.

6. monitoring Dec 27, 2025, 02:47 PM UTC

   You should now experience a smoother and more reliable experience. 🎉 Your past week's data have been replayed. You can see them in the advanced analytics circle. Because of the cache system you may not see your data updated in the sleep and energy circles. 🔁 Note: Replaying scores is resource-intensive and may temporarily slow the app or sync process. We're working on finding a solution to replay more data without impacting your current activities. 🔧 Still seeing inaccuracies? If you’re still noticing issues with data quality or metrics: Go to the top left menu > Settings > Self-Diagnostics. Follow the instructions to recalibrate your PPG sensor using the white paper test 🙏 Thank You for Your Patience We sincerely thank you for bearing with us during this transition. We’ll continue updating you by email as things progress. This challenge came from one thing: Circular's rapid success. Our servers weren’t initially calibrated to handle this growth, but now they are and they’ll stay that way for a very long time. While we can’t promise everything will be perfect overnight, what we can promise is that you’ll see major improvements, and we’re committed to constant refinement to make Circular the best health experience on the market. Thank you again, The Circular Team 🧡

7. resolved Dec 29, 2025, 04:27 AM UTC

   After monitoring we've decided to close this incident 🎉 We still have a small part of users which can't see their sleep score on new data but this comes from another scoring or firmware issue that we're working on. As a reminder: Your past week's data have been replayed. You can see them in the Advanced Analytics circle. Because of the cache system you may not see your data updated in the sleep & energy circles. 🔁 Note: Because replaying scores is resource-intensive and may interrupt your experience, we're working on finding a solution to replay more data without impacting your current activities. 🔧 Still seeing data inaccuracies? 1. Go to the top right Ring menu > Factory reset 2. Setup your ring as new on its charger 3. Once reconnected go to Settings > perform a Self Diagnostics with white paper 4. Wear it as usual 🙏 Thank You for Your Patience We sincerely thank you for bearing with us during this transition. We’ll continue updating you by email as things progress. This challenge came from one thing: Circular's rapid success. Our servers weren’t initially calibrated to handle this growth, but now they are and they’ll stay that way for a very long time. While we can’t promise everything will be perfect overnight, what we can promise is that you’ll see major improvements, and we’re committed to constant refinement to make Circular the best health experience on the market. Thank you again, The Circular Team 🧡

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Started Sep 22, 2025, 05:28 PM UTC· resolved Oct 15, 2025, 12:44 PM UTC

1. monitoring Sep 22, 2025, 05:28 PM UTC

   Over the past few days, some of you may have experienced outages with our servers. We sincerely apologize for the inconvenience. We monitor our systems real time and we are aware of outages the minute they happen. Why These Outages Happened Several overlapping factors contributed to instability: -Server-side updates and scheduled maintenance performed by our cloud provider. -Load growth driven by the increasing number of Circular users. -Connection spikes due to syncs happening at peak times. We had anticipated the surge in connections and informed our providers in advance, but the overlap of these events unfortunately caused instability and temporary shutdowns. Current Status Please know that our top priority is to stabilize everything as quickly as possible. As of this morning, all systems are back up and running with degraded performance. Your data won't be lost While we work on long-term fixes, some inconveniences might still occur in the coming weeks. That being said, your data is not LOST: -Any data synced from your ring to your phone is first stored locally on your phone until it can be uploaded to the server. -The ring itself has 7 days of onboard memory, ensuring nothing is lost even during a downtime of 48 hours. Not a Ring Issue These outages are not related to the ring itself. Your hardware is working correctly. -An “ES02 error” means the app cannot reach the server. -If the app takes a long time to open or crashes on the splash screen, this is also due to failed server communication—not a hardware issue. -The same applies when you cannot access your historical data. We fully recognize that the app should still open and function locally even when servers are down, and we are working on fixes to improve this. What NOT to do Uninstalling the app or logging out will not solve the issue. On the contrary, these actions will erase the data stored on your phone, making the problem worse for you. What to DO The best approach during a server outage is simply to wait and try again the next day. Your data will sync automatically once the servers are back online. Why Weekends Are More Impacted Communication with our providers can be more difficult on weekends until systems are relaunched, which is why downtime may sometimes last up to 48 hours. Our Next Steps We are working closely with our service providers to reinforce stability and scale infrastructure as Circular continues to grow. Our technical priority remains ensuring reliability at scale. Status Page You can always track live updates on our status page: https://circularring.statuspage.io/. Currently, it only reflects outages from our own infrastructure, but we are working on extending it so that you can also see external related issues in real time. We are committed to continuous improvements and full transparency with you. Thank you again for your understanding and trust as we scale together. — The Circular Team

2. monitoring Sep 23, 2025, 08:57 AM UTC

   We are continuing to monitor for any further issues.

3. identified Sep 24, 2025, 07:38 AM UTC

   To ensure long-term stability, we’ve added extra security layers around data synchronization, so that the servers remain stable and all users can upload their data without issues. This has caused an issue where score and sleep detection may not trigger correctly during the first data synchronization of the day. Our team is already working on a permanent fix. 🔧 Temporary solution: If this happens, simply close the app completely (swiped from background) and run another data sync later. This will trigger the sleep analysis correctly. Some metrics, such as HRV, SpO2, Breathing Rate, and Heart Rate during sleep averages, may be missing and require a third sync. 🛑 Thank you for syncing your data daily (or at least every 2 days) while the server alert is still active. This helps keep the server load lighter and ensures smaller files and faster sync for everyone. We truly appreciate your understanding and cooperation 🙏

4. monitoring Oct 03, 2025, 09:10 AM UTC

   A fix has been implemented. We are monitoring for any further issues. Please note that the Resting Heart Rate score under Energy Analysis still calculates only after a second sync. We are still investigating an issue where the server occasionally rejects certain data during processing, causing some information not to be taken into account.

5. resolved Oct 15, 2025, 12:44 PM UTC

   This incident is resolved. Over the past days, we’ve made significant upgrades to our infrastructure. You should now notice that your full scores appear correctly after your first synchronization following sleep. The synchronization process may still take a bit longer than usual, but stability and data completeness have greatly improved — which was our top priority. Next Steps: Upcoming Server Enhancements We’re not stopping here. The next round of improvements is already in progress: Database technology upgrade We’re moving to a new architecture where each connection will have its own unique instance, ensuring that one user’s activity won’t affect another’s synchronization. This will involve a database migration, which we’ll announce before it happens. Your data will remain hosted in the same ISO-certified medical servers in Paris, France. We’re only changing the technology, not the location or security. This new structure will allow Circular to scale to millions of simultaneous users in the future. Faster scoring system We’re optimizing the internal structure of how scores are processed on our servers. Our target is to bring scoring calculation down to under 3 seconds per sync. As we’ve said from the beginning, our goal is to build something lasting — reliable and scalable for many years to come. These improvements take time, but you can already feel the progress.

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Started Sep 10, 2025, 08:24 AM UTC· resolved Sep 15, 2025, 09:20 AM UTC

1. investigating Sep 10, 2025, 08:24 AM UTC

   ## 🚨 **Emergency Maintenance - Database Performance Optimization** **Impact:** Service Degradation ### **What's happening:** We're currently investigating unusual slowness and temporary crashes affecting our servers. This is our top priority, and a fix is underway. Service should stabilize after a scheduled maintenance. Thank you for your patience! Also we're performing critical database optimizations to resolve performance issues and improve system stability. ### **Expected Impact:** - Brief service interruptions during maintenance window - Temporary reduction in data processing capacity - Some features may be temporarily unavailable ### **Updates:** - Real-time updates will be posted here - No action required from users - Services will automatically resume ### **Post-Maintenance:** - Improved performance and reliability (x3 or x5 performances) - Reduced connection errors - Faster response times

2. investigating Sep 10, 2025, 08:24 AM UTC

   We are continuing to investigate this issue.

3. resolved Sep 15, 2025, 09:20 AM UTC

   This incident has been resolved.

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