# UPeU Lamb vs SeruMaster

The clearest difference is in-app purchases: UPeU Lamb at none against SeruMaster's 8. UPeU Lamb also leads on ads (none vs shown). SeruMaster's advantage is update cadence (weekly vs every 3 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. SeruMaster sells 8 in-app purchases, starting at $3.99 per month. UPeU Lamb asks for nothing beyond the download.

UPeU Lamb ships an update every 3 weeks, SeruMaster weekly. The most recent releases landed on October 10, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | UPeU Lamb | SeruMaster |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 119 MB | 298 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Universidad Peruana Unión](https://appshunter.io/developer/1202009386) | [Pool Brayan Loayza Ramirez](https://appshunter.io/developer/1893687701) |

## What reviewers say

### UPeU Lamb

[App page](https://appshunter.io/ios/app/upeu-lamb/id1428977402)

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

**In-app purchases:** none


### SeruMaster

[App page](https://appshunter.io/ios/app/serumaster/id6762292417)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pase Clínico (1 Mes) | $3.99 | per month |
| Trimestre Pro | $9.99 | per 3 months |
| Pase Intensivo (6 Meses) | $19.99 | per 6 months |
| Pase Anual (12 Meses) | $29.99 | per year |
| Bolsa de SeruCoins | $0.99 | one-time |
| Maletín de SeruCoins | $2.99 | one-time |
| Cofre de SeruCoins | $6.99 | one-time |
| Bóveda de SeruCoins | $19.99 | one-time |


## Frequently asked questions

### Is UPeU Lamb free?

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

### Is SeruMaster free?

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

### Do UPeU Lamb or SeruMaster have ads?

SeruMaster shows ads; UPeU Lamb does not.

### Which is updated more often, UPeU Lamb or SeruMaster?

UPeU Lamb ships an update every 3 weeks, and SeruMaster weekly. Most recently, UPeU Lamb was updated on October 10, 2026 and SeruMaster on October 17, 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.*