# UCSF Eureka Research vs Skinly

The clearest difference is ratings volume: UCSF Eureka Research at 329 against Skinly's 10. On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 3.1 for UCSF Eureka Research against 3.2 for Skinly. That said, the two scores are not equally well evidenced: UCSF Eureka Research has 329 ratings behind it against 10, so its average is the more settled of the two. Written reviews are what separate them: 22% of UCSF Eureka Research's written reviews are positive against 28% of Skinly's.

UCSF Eureka Research ships an update every 5 weeks, Skinly every 3 weeks. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | UCSF Eureka Research | Skinly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (329 ratings)](https://appshunter.io/ios/app/ucsf-eureka-research/id1235219119/reviews) | **[3.2 (10 ratings)](https://appshunter.io/ios/app/skinly/id1475106975/reviews)** |
| Number of ratings | **329** | 10 |
| Positive reviews | 22.2% of reviews | **28.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 61 MB | 192 MB |
| Requires iOS | **14.0** | 15 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [University of California at San Francisco](https://appshunter.io/developer/446489325) | [Beiersdorf Shared Services GmbH](https://appshunter.io/developer/1288498064) |

## What reviewers say

### UCSF Eureka Research

[App page](https://appshunter.io/ios/app/ucsf-eureka-research/id1235219119)

Participate in real medical research studies from your smartphone to help solve major health issues. Contribute to world-changing research with top universities and make a significant impact on causes you care about.

**Highlights:** Join medical research studies, Contribute to health problem solutions, Participate via smartphone, Support top research universities, Track impact on health causes

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Smooth performance
- 👍 Easy to use
- 💡 Allows participation in multiple studies
- 👍 Reassuring to be run by academic institution

**What reviewers complain about**

- 🐛 Crashes frequently
- 🔋 High battery consumption
- 🔒 Concerns about data security and privacy
- 👎 Buggy and unstable
- 👎 Unreliable login and password reset functionality

**Reported bugs**

- App crashes during data entry
- Login issues, unable to reset password
- Incompatible with certain devices (e.g., jailbroken, older devices)
- Unexpected behavior when trying to opt out or delete account

**Requested features**

- Improve stability and reliability
- Provide better instructions and guidance
- Add support for international users
- Improve battery optimization


### Skinly

[App page](https://appshunter.io/ios/app/skinly/id1475106975)

This application is part of a closed study focused on facial skin analysis. It requires a separate device and an invitation-only access code for study participants to guide measurement procedures and track progress.

**Highlights:** Facial skin analysis, Guided measurement procedures, Progress tracking, Closed study participation, Requires separate device

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is UCSF Eureka Research free?

UCSF Eureka Research is free to download, with no in-app purchases.

### Is Skinly free?

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

### Which has better reviews, UCSF Eureka Research or Skinly?

Skinly is rated higher. UCSF Eureka Research averages 3.1 out of 5 from 329 ratings, while Skinly averages 3.2 from 10 ratings.

### Do UCSF Eureka Research or Skinly have ads?

Neither UCSF Eureka Research nor Skinly shows ads.

### Which is updated more often, UCSF Eureka Research or Skinly?

UCSF Eureka Research ships an update every 5 weeks, and Skinly every 3 weeks. Most recently, UCSF Eureka Research was updated on October 14, 2026 and Skinly on October 12, 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.*