# 蛋壳之眼 vs PerformanceX

The clearest difference is update cadence: PerformanceX at monthly against 蛋壳之眼's every 6 months. 蛋壳之眼's advantage is iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 蛋壳之眼 sells 2 in-app purchases, starting at $3.99 per month and PerformanceX sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

蛋壳之眼 ships an update every 6 months, PerformanceX monthly. The most recent releases landed on October 12, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | 蛋壳之眼 | PerformanceX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6443984456/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 12 MB | 119 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [谚华 张](https://appshunter.io/developer/1097524045) | [顽石运动智能科技(北京)有限公司](https://appshunter.io/developer/1112625269) |

## What reviewers say

### 蛋壳之眼

[App page](https://appshunter.io/ios/app/id6443984456)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 蛋壳之眼按月订阅 | $3.99 | per month |
| 按年订阅 | $41.99 | per year |


### PerformanceX

[App page](https://appshunter.io/ios/app/performancex/id6745584273)

This app uses advanced video analysis and biomechanical algorithms to provide precise jump performance testing and data analysis for athletes and coaches. It offers various jump tests, strength-speed relationship analysis, and functional strength assessments, with detailed biomechanical parameter calculations.

**Highlights:** Vertical jump testing (CMJ, SJ, DJ), Strength-speed relationship analysis, Functional strength testing (Nordic Hamstring), Automatic biomechanical parameter calculation, Video analysis with high frame rate support, Athlete and team data management, CSV data export

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $2.99 | per month |
| 年度会员 | $24.99 | per year |
| 终身会员 | $59.99 | one-time |


## Frequently asked questions

### Is 蛋壳之眼 free?

蛋壳之眼 is free to download, with in-app purchases available.

### Is PerformanceX free?

PerformanceX is free to download, with in-app purchases available.

### Do 蛋壳之眼 or PerformanceX have ads?

Neither 蛋壳之眼 nor PerformanceX shows ads.

### Which is updated more often, 蛋壳之眼 or PerformanceX?

蛋壳之眼 ships an update every 6 months, and PerformanceX monthly. Most recently, 蛋壳之眼 was updated on October 12, 2026 and PerformanceX on October 2, 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.*