# DORM SDU vs Prim Chinese

The clearest difference is update cadence: Prim Chinese at daily against DORM SDU's every 6 months. DORM SDU's advantage is iOS requirement (13.0 vs 15.0). 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.

DORM SDU ships an update every 6 months, Prim Chinese daily. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | DORM SDU | Prim Chinese |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Daily** |
| Size | 19 MB | 13 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [GT TECHNOLOGIES COMPANY LIMITED](https://appshunter.io/developer/1592961916) | [Warakorn Peannula](https://appshunter.io/developer/6814164403) |

## What reviewers say

### DORM SDU

[App page](https://appshunter.io/ios/app/dorm-sdu/id6444823369)

**Features:** macOS Compatibility

**In-app purchases:** none


### Prim Chinese

[App page](https://appshunter.io/ios/app/prim-chinese/id6826797933)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DORM SDU free?

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

### Is Prim Chinese free?

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

### Do DORM SDU or Prim Chinese have ads?

Neither DORM SDU nor Prim Chinese shows ads.

### Which is updated more often, DORM SDU or Prim Chinese?

DORM SDU ships an update every 6 months, and Prim Chinese daily. Most recently, DORM SDU was updated on November 12, 2026 and Prim Chinese on October 31, 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.*