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| Citizen's new notice applies to watches using the W770, W770 Riiiver, W410, and W510 calibers. |
A quiet but significant announcement from Citizen has just confirmed that the company will pull the plug on app support for a range of its older Bluetooth-enabled watches. If you own one of these hybrid or smart timepieces, the clock is now ticking on its connected features.
In a notice quietly published on March 30-31, 2026, the Japanese watchmaker disclosed that as of December 31, 2027, it will no longer provide service for the dedicated smartphone apps that power several of its watch platforms. The full details and the official statement are available here on Citizen’s official announcement page.
🎯 Which Models and Calibers Are Affected?
The shutdown directly impacts watches using four specific calibers: W770, W770 Riiiver, W410, and W510. These movements are found across a wide range of Citizen’s Bluetooth watch lineup, including models tied to the brand’s ambitious Riiiver IoT platform.
A full, lengthy list of affected references has been published, notably including all models with case numbers beginning with "EE" and "BZ". If your Citizen watch connects to a smartphone app for anything beyond basic timekeeping, it is highly advisable to check this list.
📱 What Will and Won’t Stop Working?
The core promise of Citizen’s Eco-Drive technology—a watch that runs indefinitely on any light source—remains intact. The company has confirmed that basic timekeeping will continue to be supported as long as repair parts are available.
However, all the "smart" features that required a phone connection are being sunset. This includes:
- Smartphone notifications for calls, emails, and texts.
- Automatic time and calendar syncing via Bluetooth.
- All functions linked to the Riiiver platform, which allowed users to create custom "iiideas" and connect their watch to internet services.
In essence, these watches will revert to being standard, high-quality analog quartz timepieces. The "hybrid" part of the equation is being permanently switched off.
📅 The End-of-Support Timeline and Liability Disclaimer
The deadline for app functionality is set for December 31, 2027. From January 1, 2028, Citizen warns that the companion apps may stop working reliably or become completely inaccessible due to ongoing, inevitable updates to smartphone operating systems (iOS and Android).
Crucially, the company adds that it will not be liable for any loss of functionality tied to these apps after that date. This is a standard but important disclaimer, shifting the responsibility for long-term software maintenance away from the manufacturer.
📉 A Familiar Pattern in the Watch Industry
This move is not entirely surprising and mirrors a trend seen across the watch industry. We saw a very similar situation play out with Fossil, which also gradually abandoned its early hybrid and smartwatch platforms as they became difficult and costly to maintain.
The core issue is the dependence on rapidly evolving mobile operating systems and third-party cloud services. Maintaining legacy apps for a shrinking user base is simply not a sustainable business model for traditional watchmakers.
🔄 Citizen’s Broader Strategy: A Pivot to True Hybrids?
This announcement seems to confirm a broader strategic shift for Citizen. While they are winding down these first-generation Bluetooth platforms, they are not exiting the smartwatch space. Instead, they are doubling down on more advanced, purpose-built hybrid smartwatches.
The company’s current CZ Smart Hybrid lineup, for instance, offers a much more integrated experience with up to 18 days of battery life, health monitoring, and customizable dials—all powered by a newer, more robust platform. This suggests a clear move away from fragmented, app-dependent legacy systems and toward a more cohesive and modern ecosystem.
⚠️ What Should Affected Users Do Now?
If you own an affected Citizen Bluetooth watch, you have a couple of years to prepare. Here is some practical advice:
- Enjoy it while it lasts: You can continue using all smart features normally until the end of 2027.
- Avoid overpaying: Be cautious when considering a used model from the affected series, as its "smart" value will soon be zero.
- Look to the future: For those who value connected features, Citizen’s current CZ Smart Hybrid lineup is the clear upgrade path.
For those who still appreciate the style and Eco-Drive reliability of these models, they will continue to serve as excellent, maintenance-free analog watches for many years to come.
Looking for a future-proof alternative? Check out the Citizen BI5050-54E on Amazon.
Buy Citizen BI5050-54E on Amazon
Photo by Hans Gaber on Unsplash
