# CITIZEN Eco-Drive Bluetooth S

> Connects CITIZEN Bluetooth watches to smartphones for time sync and notifications. (iPhone/iPad app by CITIZEN WATCH CO.,LTD.)

- Source: https://appshunter.io/ios/app/citizen-eco-drive-bluetooth-s/id1268478800 (this page in markdown: same URL + `.md`)
- Developer: [CITIZEN WATCH CO.,LTD](https://appshunter.io/developer/434806605)
- Category: Utilities, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 15.6 · 67 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, European Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2018-08-02
- Data updated: 2026-08-14
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/citizen-eco-drive-bluetooth-s/id1268478800/reviews.md

## What is CITIZEN Eco?

*Important Notice
Thank you for using Citizen products.
As of 12/31/2027, we will no longer provide service for dedicated apps for some models and functions used in conjunction with the apps.
For details, see this link.
https://www.citizenwatch-global.com/support/im/smartwatch.html

Overview

This is the official app for linking your smartphone with CITIZEN Bluetooth® watches. 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 the CITIZEN Bluetooth Watch, you get to enjoy an exquisite 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 to replace batteries or recharge via cable.
 
Features 

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 (smartphone time).

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

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

5. Alarm
Set your alarm from your smartphone. You can set up to 3 alarms at one time.  By setting your watch alarm using the smartphone app. The alarm can be set for different times and/or 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. Misplaced your smartphone? Not a problem. Use your watch to locate your phone by having it 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 or rotates the hands to let you know when the link between your smartphone and your watch is broken.

This app requires iOS 11.2 or later. 
Notifications have  the options of 15 different original sounds, exclusively prepared for the W410 mode

About Eco-Drive:
Eco-Drive is a CITIZEN proprietary light-powered technology which eliminates the need for replacing 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.
http://www.citizenwatch-global.com/technologies/index.html#eco-drive

* Some models run for less than six months.

## Key features

- Automatic time synchronization
- World time settings
- Call and message notifications
- Customizable alarms
- Light level indicator
- Smartphone search function
- Link loss alerts

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/citizen-eco-drive-bluetooth-s/id1268478800/reviews.md

### 1/5 — 最新のIOSへの対応が遅い

*2021-05-14*

最新のIOSへの対応していないため、セキュリティ対応に問題あり。実質使えない。また、説明書通りに設定しても、iPhoneとのbluetoothがすぐ切れる。iPhone11にしてから、ほとほと使い物にならない。非常に不満。

### 1/5 — アプリから接続できない

*2019-07-22*

以前も接続が不安定でしたが、iOS12に更新してからはiPhoneの設定からでないと繋がらなくなりました。

### 1/5 — スマートウォッチとして考えない方が…。

*2019-06-28*

スマホと接続してもすぐ切れる。電話、メールの設定しても作動しない事も…。普通のアナログ時計プラスアルファと思います。外の移動中にBluetoothオンで室内ではオフという使い方をしています。

### 1/5 — ペアリングが不安定

*2019-06-03*

接続設定して、一旦は繫るが、次からは繋がらならなくなる。何回か再設定しているが、不安定な気がする。

### 1/5 — 改善を望みます

*2018-12-01*

Bluetoothの通信は接続出来ているのにアプリがそれを検知出来ず接続失敗…アプリの品質管理出来ているのかな。

### 1/5 — 繋がってもすぐ切れる

*2018-09-26*

１分も持ちません。最悪。

## Frequently asked questions about CITIZEN Eco

### What is the CITIZEN Eco-Drive Bluetooth S app?

The CITIZEN Eco-Drive Bluetooth S app is the official application designed to link your smartphone with compatible CITIZEN Bluetooth watches. It enables features like time synchronization, alarm setting, and receiving notifications for calls and messages directly on your watch.

### What are the main features of CITIZEN Eco-Drive Bluetooth S?

Key features include automatic time synchronization with your smartphone, world time settings, call and message notifications with customizable filters, the ability to set up to three alarms, a light level indicator for the watch's power, a smartphone search function, and link loss alerts.

### What is Eco-Drive technology?

Eco-Drive is CITIZEN's proprietary light-powered technology. It generates power from any light source, including sunlight and dim light, to drive the watch and store surplus energy, eliminating the need for battery replacements or recharging.

### What devices is CITIZEN Eco-Drive Bluetooth S compatible with?

The app is compatible with iPhones and iPods and requires iOS 11.2 or later. It is designed to work with specific CITIZEN Bluetooth watches.

### Does CITIZEN Eco-Drive Bluetooth S have ads?

No, the CITIZEN Eco-Drive Bluetooth S app is ad-free. It provides a seamless user experience without any advertisements.

### How often is CITIZEN Eco-Drive Bluetooth S updated?

The latest version is 1.0.054, and the app was last updated on June 15, 2026. While specific update frequency isn't detailed, this indicates ongoing support and development.

### What is the age rating for CITIZEN Eco-Drive Bluetooth S?

The app has an age rating of 4+, making it suitable for a wide range of users. This rating suggests it contains no mature content.

### Can I set multiple alarms with CITIZEN Eco-Drive Bluetooth S?

Yes, you can set up to three alarms simultaneously using the CITIZEN Eco-Drive Bluetooth S app. These alarms can be configured for different times and days of the week.

## Version history (last 5 releases)

### 1.0.054 — 2026-06-15

Thank you as always for using our app.
We have made the following updates:

- Some minor maintenance and bug fixes.

### 1.0.053 — 2025-09-04

Thank you as always for using our app.
We have made the following updates:

- Added and removed apps that support notification functions.
- Some minor maintenance and bug fixes.

### 1.0.052 — 2023-11-20

Thank you as always for using our app. We have made the following updates:

- Change of specifications related to "X notification function"
- Change of specifications related to "Light Level"
- Some minor maintenance and bug fixes.

### 1.0.051 — 2023-06-01

･Stability is enhanced.
･Bug fixes.

### 1.0.050 — 2022-04-26

･Stability is enhanced.
･Bug fixes.

## Apps similar to CITIZEN Eco

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Timegrapher - watch accuracy](https://appshunter.io/ios/app/timegrapher-watch-accuracy/id6450460771) | 2.8 (44) | Free | Utilities |
| [AtomicClock: NTP Time](https://appshunter.io/ios/app/atomicclock-ntp-time/id1402993049) | 4.8 (5,491) | Free | Utilities |
| [Time Calibrator](https://appshunter.io/ios/app/time-calibrator/id786988278) | 2.7 (3) | Free | Utilities |
| [PRO TREK Connected](https://appshunter.io/ios/app/pro-trek-connected/id1456086278) | 4.6 (344) | Free | Utilities |
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## More apps by CITIZEN WATCH CO.,LTD

- [Citizen Eco-Drive Proximity2.5](https://appshunter.io/ios/app/citizen-eco-drive-proximity25/id824074813)
- [CITIZEN Bluetooth Watch](https://appshunter.io/ios/app/citizen-bluetooth-watch/id1068381349)
- [CITIZEN Eco-Drive W510](https://appshunter.io/ios/app/citizen-eco-drive-w510/id1423016104)
- [Riiiver](https://appshunter.io/ios/app/riiiver/id1449580790)
- [CITIZEN CONNECTED](https://appshunter.io/ios/app/citizen-connected/id1483037539)

All apps by CITIZEN WATCH CO.,LTD: https://appshunter.io/developer/434806605

## Related topics

[citizen bluetooth watch](https://appshunter.io/ios/topics/citizen-bluetooth-watch) · [citizen proximity](https://appshunter.io/ios/topics/citizen-proximity) · [my citizen watch](https://appshunter.io/ios/topics/my-citizen-watch)

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*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 2026-08-14.*