# 电波表对时 Time Sync vs Chmu

The clearest difference is price: Chmu at Free against 电波表对时 Time Sync's $0.99. 电波表对时 Time Sync's advantage is update cadence (daily vs weekly) and device support (3 vs 1). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Chmu 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.

On the App Store both sit at effectively the same score — 5.0 for 电波表对时 Time Sync against 5.0 for Chmu. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

电波表对时 Time Sync ships an update daily, Chmu weekly. The most recent releases landed on September 26, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 电波表对时 Time Sync | Chmu |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/time-sync/id6447857623/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/chmu/id6757212153/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Weekly |
| Monetization | Paid | **Free** |
| Size | 25 MB | 47 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [大连森林互动科技有限公司](https://appshunter.io/developer/1602532041) | [SyncSmart](https://appshunter.io/developer/1865363417) |

## What reviewers say

### 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


### Chmu

[App page](https://appshunter.io/ios/app/chmu/id6757212153)

This utility app synchronizes data, controls, and interactions between smart AI glasses and mobile devices. It facilitates seamless management of your connected eyewear experience.

**Highlights:** Data synchronization, Command control, Interaction management, Smart AI glasses integration, Mobile device connectivity

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

**In-app purchases:** none


## Frequently asked questions

### Is 电波表对时 Time Sync free?

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

### Is Chmu free?

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

### Which has better reviews, 电波表对时 Time Sync or Chmu?

电波表对时 Time Sync and Chmu are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

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

Neither 电波表对时 Time Sync nor Chmu shows ads.

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

电波表对时 Time Sync ships an update daily, and Chmu weekly. Most recently, 电波表对时 Time Sync was updated on September 26, 2026 and Chmu on September 19, 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.*