# CITIZEN Eco vs 电波表对时 Time Sync

The clearest difference is review sentiment: 电波表对时 Time Sync at 77% against CITIZEN Eco's 0%. 电波表对时 Time Sync also leads on update cadence (daily vs every 5 months) and iOS requirement (11.0 vs 15.6). CITIZEN Eco's advantage is price (Free vs $0.99). On ads, in-app purchases and device support there is nothing between them.

CITIZEN Eco is free to download; 电波表对时 Time Sync costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CITIZEN Eco ships an update every 5 months, 电波表对时 Time Sync daily. The most recent releases landed on September 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | CITIZEN Eco | 电波表对时 Time Sync |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/time-sync/id6447857623/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | **76.9% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Daily** |
| Monetization | **Free** | Paid |
| Size | 67 MB | 25 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CITIZEN WATCH CO.,LTD](https://appshunter.io/developer/434806605) | [大连森林互动科技有限公司](https://appshunter.io/developer/1602532041) |

## What reviewers say

### CITIZEN Eco

[App page](https://appshunter.io/ios/app/citizen-eco-drive-bluetooth-s/id1268478800)

This app connects your smartphone to compatible watches, allowing you to sync time, set alarms, and receive notifications for calls and messages. It also features world time settings and a light level indicator for the watch's power source.

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 电波表对时 Time Sync

[App page](https://appshunter.io/ios/app/time-sync/id6447857623)

This utility app simulates six major radio wave clock signals to synchronize atomic watches. It features a "MAX" gain mode for faster synchronization and a realistic interface inspired by radio oscilloscopes. The app is ad-free and offers a pure, user-focused experience for all atomic watch owners.

**Highlights:** Simulates six global radio wave signals, MAX gain signal mode for fast syncing, Supports all atomic watches and clocks, Realistic radio oscilloscope interface, Ad-free and no in-app purchases

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CITIZEN Eco free?

CITIZEN Eco is free to download, with no in-app purchases.

### Is 电波表对时 Time Sync free?

电波表对时 Time Sync costs $0.99, with no in-app purchases.

### Do CITIZEN Eco or 电波表对时 Time Sync have ads?

Neither CITIZEN Eco nor 电波表对时 Time Sync shows ads.

### Which is updated more often, CITIZEN Eco or 电波表对时 Time Sync?

CITIZEN Eco ships an update every 5 months, and 电波表对时 Time Sync daily. Most recently, CITIZEN Eco was updated on September 25, 2026 and 电波表对时 Time Sync on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*