# PSC vs 膜界

PSC and 膜界 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

PSC ships an update monthly, 膜界 every 4 weeks. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | PSC | 膜界 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/id1559142258/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Size | 32 MB | 46 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [深圳市经亿智能科技有限公司](https://appshunter.io/developer/1503443348) | [Wuxi Hongdian Wisdom Technology Co.ltd](https://appshunter.io/developer/1559142260) |

## What reviewers say

### PSC

[App page](https://appshunter.io/ios/app/psc/id1503443349)

**Features:** macOS Compatibility

**In-app purchases:** none


### 膜界

[App page](https://appshunter.io/ios/app/id1559142258)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PSC free?

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

### Is 膜界 free?

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

### Do PSC or 膜界 have ads?

Neither PSC nor 膜界 shows ads.

### Which is updated more often, PSC or 膜界?

PSC ships an update monthly, and 膜界 every 4 weeks. Most recently, PSC was updated on October 8, 2026 and 膜界 on October 9, 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.*