# Correctional Services Bureau vs 券易用

The clearest difference is in-app purchases: Correctional Services Bureau at none against 券易用's 3. Correctional Services Bureau also leads on iOS requirement (15.6 vs 17.0). 券易用's advantage is update cadence (every 3 days vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. 券易用 sells 3 in-app purchases, starting at $0.99 per month. Correctional Services Bureau asks for nothing beyond the download.

Correctional Services Bureau ships an update every 5 months, 券易用 every 3 days. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Correctional Services Bureau | 券易用 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 days** |
| Size | 13 MB | 7 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Correctional Services Bureau](https://appshunter.io/developer/1228513133) | [WAN HOU KOU](https://appshunter.io/developer/1895367325) |

## What reviewers say

### Correctional Services Bureau

[App page](https://appshunter.io/ios/app/correctional-services-bureau/id1228513134)

**Features:** macOS Compatibility

**In-app purchases:** none


### 券易用

[App page](https://appshunter.io/ios/app/id6763545720)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annual Membership | $3.99 | per year |
| Permanent member | $6.99 | one-time |


## Frequently asked questions

### Is Correctional Services Bureau free?

Correctional Services Bureau is free to download, with no in-app purchases.

### Is 券易用 free?

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

### Do Correctional Services Bureau or 券易用 have ads?

Neither Correctional Services Bureau nor 券易用 shows ads.

### Which is updated more often, Correctional Services Bureau or 券易用?

Correctional Services Bureau ships an update every 5 months, and 券易用 every 3 days. Most recently, Correctional Services Bureau was updated on November 6, 2026 and 券易用 on November 5, 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.*