# CU스쿨 vs Hey, Sir

The clearest difference is in-app purchases: CU스쿨 at none against Hey, Sir's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Hey, Sir sells 2 in-app purchases, starting at $3.99 per month. CU스쿨 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on September 23, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | CU스쿨 | Hey, Sir |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 35.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | Free | — |
| Size | 97 MB | 3 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [KYUHAN KIM](https://appshunter.io/developer/1290634999) | [YOUJONG KIM](https://appshunter.io/developer/6776623762) |

## What reviewers say

### CU스쿨

[App page](https://appshunter.io/ios/app/cu/id1503486454)

Manage staff and store operations efficiently with this app. Features include attendance tracking, payroll calculation, task checklists, and expiration date management. Stay informed with alerts for important renewals and tasks.

**Highlights:** Staff attendance and payroll, Daily checklists and work logs, Expiration date calendar, Renewal alerts for certifications, Remote attendance monitoring, Staff schedule viewing

**Features:** macOS Compatibility

**In-app purchases:** none


### Hey, Sir

[App page](https://appshunter.io/ios/app/hey-sir/id6776623760)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hey, Sir Premium Monthly | $3.99 | per month |
| Hey, Sir Premium Annual | $34.99 | per year |


## Frequently asked questions

### Is CU스쿨 free?

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

### Is Hey, Sir free?

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

### Do CU스쿨 or Hey, Sir have ads?

Neither CU스쿨 nor Hey, Sir shows ads.

### Which is updated more often, CU스쿨 or Hey, Sir?

CU스쿨 ships an update every 5 days, and Hey, Sir every 5 days. Most recently, CU스쿨 was updated on September 23, 2026 and Hey, Sir on October 1, 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.*