# 火星探索者 vs Echo Eye

The clearest difference is update cadence: Echo Eye at every 3 weeks against 火星探索者's every 17 months. 火星探索者's advantage is iOS requirement (11.0 vs 14.0). 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.

火星探索者 ships an update every 17 months, Echo Eye every 3 weeks. The most recent releases landed on June 4, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | 火星探索者 | Echo Eye |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 3 weeks** |
| Size | 128 MB | 75 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Du Chongyang Trading Co., Ltd](https://appshunter.io/developer/1454881718) | [HSC Tech Limited](https://appshunter.io/developer/1810433761) |

## What reviewers say

### 火星探索者

[App page](https://appshunter.io/ios/app/id1535921982)

**Features:** macOS Compatibility

**In-app purchases:** none


### Echo Eye

[App page](https://appshunter.io/ios/app/echo-eye/id6745018632)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 火星探索者 free?

火星探索者 is free to download, with no in-app purchases.

### Is Echo Eye free?

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

### Do 火星探索者 or Echo Eye have ads?

Neither 火星探索者 nor Echo Eye shows ads.

### Which is updated more often, 火星探索者 or Echo Eye?

火星探索者 ships an update every 17 months, and Echo Eye every 3 weeks. Most recently, 火星探索者 was updated on June 4, 2026 and Echo Eye on September 10, 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.*