# Skill Series vs u

The clearest difference is in-app purchases: Skill Series at none against u's 2. Skill Series also leads on update cadence (every 10 days vs every 3 weeks) and iOS requirement (11.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. u sells 2 in-app purchases, starting at $12.99 per month. Skill Series asks for nothing beyond the download.

Skill Series ships an update every 10 days, u every 3 weeks. The most recent releases landed on September 8, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Skill Series | u |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/u-sim/id6476834207/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 78 MB | 100 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [UpSurgeOn](https://appshunter.io/developer/1193542467) | [Tom Fadial](https://appshunter.io/developer/1316852248) |

## What reviewers say

### Skill Series

[App page](https://appshunter.io/ios/app/skill-series/id1642351463)

Learn and practice essential surgical techniques like microsurgery and anastomoses through guided exercises and video tutorials. This app is specifically designed for medical students and surgery residents to hone their skills.

**Highlights:** Microsurgery exercises, Anastomoses practice, Macrosurgery training, Video tutorials, Skill development

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

**In-app purchases:** none


### u

[App page](https://appshunter.io/ios/app/u-sim/id6476834207)

Engage in dynamic medical simulations powered by AI. Input a complaint or topic to generate a realistic patient scenario. Practice diagnostic and treatment skills with interactive feedback and learning resources.

**Highlights:** AI-generated dynamic simulation scenarios, Interactive patient case progression, Request diagnostic tests and consultations, Detailed feedback and learning points, On-demand medical training

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $12.99 | per month |
| 20 Pack | $29.99 | one-time |


## Frequently asked questions

### Is Skill Series free?

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

### Is u free?

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

### Do Skill Series or u have ads?

Neither Skill Series nor u shows ads.

### Which is updated more often, Skill Series or u?

Skill Series ships an update every 10 days, and u every 3 weeks. Most recently, Skill Series was updated on September 8, 2026 and u on September 15, 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.*