# China Spring ISD, TX vs P.S. 20

The clearest difference is update cadence: P.S. 20 at every 6 weeks against China Spring ISD, TX's every 38 months. P.S. 20 also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

China Spring ISD, TX ships an update every 38 months, P.S. 20 every 6 weeks. The most recent releases landed on October 19, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | China Spring ISD, TX | P.S. 20 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 6 weeks** |
| Size | 117 MB | 164 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [China Spring ISD](https://appshunter.io/developer/1665689304) | [Solved Education Consultancy, LLC](https://appshunter.io/developer/1506645558) |

## What reviewers say

### China Spring ISD, TX

[App page](https://appshunter.io/ios/app/china-spring-isd-tx/id1665689302)

**In-app purchases:** none


### P.S. 20

[App page](https://appshunter.io/ios/app/ps-20/id6479322609)

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

**In-app purchases:** none


## Frequently asked questions

### Is China Spring ISD, TX free?

China Spring ISD, TX is free to download, with no in-app purchases.

### Is P.S. 20 free?

P.S. 20 is free to download, with no in-app purchases.

### Do China Spring ISD, TX or P.S. 20 have ads?

Neither China Spring ISD, TX nor P.S. 20 shows ads.

### Which is updated more often, China Spring ISD, TX or P.S. 20?

China Spring ISD, TX ships an update every 38 months, and P.S. 20 every 6 weeks. Most recently, China Spring ISD, TX was updated on October 19, 2026 and P.S. 20 on October 25, 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.*