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This is the official app for linking your smartphone with CITIZEN Bluetooth watches (Bluetooth® version 4.0 or later). The app, which works with iPhone, enables you to set the time and the alarm for your watch, and to receive alerts for incoming calls, mails and texts. With CITIZEN Bluetooth Watch, you get to enjoy a handsome-looking analogue watch that tells the accurate time wherever you are plus the great convenience of a smartphone link.

CITIZEN Bluetooth features CITIZEN’s proprietary light-powered technology Eco-Drive. Eco-Drive eliminates the need of periodic replacement of batteries or recharge via cable.


1. Time Sync
Get the right time, all the time. When you connect with your smartphone, the time on your watch automatically updates to the current time (home time).

2. Local Time
Get the time in any city around the world. Just touch the world map inside the app to set your watch to the time there (local time).

3. Call Notification
Find out when you get a call. The watch emits a sound, vibrates or rotates the hands to let you know when you get a call. A filter function enables you to specify which callers will trigger alerts.

4. Message Notification
Find out when you get a mail, text or SNS notification. The watch emits a sound, vibrates or rotates the hands to let you know when a new e-mail or SNS notification has arrived. You can select the apps for which you wish to receive alerts.

5. Alarm
Set your alarm from your smartphone. Set your watch alarm using the smartphone app. The alarm can be set for different times for different days of the week.

6. Light Level Indicator
See how much light—and power—your dial is getting. Find out how much power your watch is generating by tracking the light it’s exposed to on a daily, weekly or monthly basis. This unique function reflects CITIZEN’s status as a pioneer of light-powered technology.

7. Smartphone Search
Find your smartphone easily. Mislaid your smartphone? Not a problem. Use your watch to locate your phone by getting it to emit a sound to indicate its whereabouts. (Range limitations apply.)

8. Link Loss Alert
Get alerted when you’ve forgotten your smartphone somewhere. The watch emits a sound, vibrates or rotates the hands to let you know when the link between your smartphone and your watch is broken.

This app requires iOS 9.3 or later.
Optimized for iPhone 5 or greater.
*Even if your smatphone is under the conditions above, there is no guarantee to use the dedicated app correctly on your smartphone.

About Eco-Drive:
Eco-Drive is a CITIZEN proprietary light-powered technology which eliminates the need of periodic replacement of batteries. Eco-Drive generates power from any kind of light—from sunlight to dim light—to drive the watch, and stores the surplus on a rechargeable cell. On a single full charge it can run for up to six months in total darkness*. For more details, click here.

* Some models run for less than six months.

What’s New

Version 1.2.149

・Stability is enhanced.
・Bug fixes.

Ratings and Reviews

3.0 out of 5
5 Ratings

5 Ratings

rick from New york ,


The watch is great but the app is not. It keeps disconnecting my phone all the time. I tried everything, my phone was never more than 3’ away but to no avail. This watch should connect by itself whenever it loses connection, however I must reconnect manually, what a poor design.
How am I supposed to know it lost connection?
Back to the drawing board please and fix this bug. My phone is an X model with the latest OS.
A nice feature is when the phone notifies an email arrive or a phone call is incoming. However this is a useless feature because the phone is always disconnected.

walortega ,

Date need to be fix

Can you please fix the date to go back to the changing at 3:00am also would be great if your app can save the changes you make to be transfer to the watch


JesseRosenbaum ,

Works Well, But Not Perfect

I just received my Citizen W770 as a gift and all in all the watch works great from the tech standpoint.

The common complaint I see most people make is the Bluetooth disconnecting randomly, even when in close proximity. I have experienced that a few times so far, but I’d imagine that can either be fixed with an App Update or a firmware update to the watch. My hope is that Citizen sees enough people mentioning the sporadic connectivity issues and works on a fix to improve that.

Thankfully when it does disconnect it’s a simple task to get it reconnected and doesn’t lead I to a complicated process. Hopefully future updates improve that part, otherwise the app does exactly what it advertises and works well for me.

App Privacy

The developer, CITIZEN WATCH CO.,LTD, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


77.1 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Italian, Japanese, Portuguese, Simplified Chinese, Spanish, Traditional Chinese

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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