# 智慧有聲號誌 vs Ear Sonar

The clearest difference is iOS requirement: 智慧有聲號誌 at 10.2 against Ear Sonar's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | 智慧有聲號誌 | Ear Sonar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 28 MB | 18 MB |
| Requires iOS | **10.2** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kang Wu](https://appshunter.io/developer/1261000921) | [乃君 黄](https://appshunter.io/developer/1337343608) |

## What reviewers say

### 智慧有聲號誌

[App page](https://appshunter.io/ios/app/id1468872229)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ear Sonar

[App page](https://appshunter.io/ios/app/ear-sonar/id6800315771)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 智慧有聲號誌 free?

智慧有聲號誌 is free to download, with no in-app purchases.

### Is Ear Sonar free?

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

### Do 智慧有聲號誌 or Ear Sonar have ads?

Neither 智慧有聲號誌 nor Ear Sonar shows ads.

---

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