# Argus vs UCSF Eureka Research

The clearest difference is review sentiment: Argus at 82% against UCSF Eureka Research's 22%. Argus also leads on rating (4.9 vs 3.1) and ratings volume (36K vs 329). UCSF Eureka Research's advantage is in-app purchases (none vs 10) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Argus sells 10 in-app purchases, starting at $4.99 per month. UCSF Eureka Research asks for nothing beyond the download.

Argus holds the better App Store score, 4.9 against 3.1. That said, the two scores are not equally well evidenced: Argus has 36K ratings behind it against 329, so its average is the more settled of the two. Written reviews point the same way: 82% of Argus's written reviews are positive against 22% of UCSF Eureka Research's.

Argus ships an update monthly, UCSF Eureka Research every 5 weeks. The most recent releases landed on September 27, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | Argus | UCSF Eureka Research |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (36K ratings)](https://appshunter.io/ios/app/argus-pedometer-step-tracker/id624329444/reviews)** | [3.1 (329 ratings)](https://appshunter.io/ios/app/ucsf-eureka-research/id1235219119/reviews) |
| Number of ratings | **36K** | 329 |
| Positive reviews | **81.7% of reviews** | 22.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 188 MB | 61 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPod, Apple Watch** |
| Age rating | 12+ | 17+ |
| Developer | [Azumio Inc.](https://appshunter.io/developer/439290207) | [University of California at San Francisco](https://appshunter.io/developer/446489325) |

## What reviewers say

### Argus

[App page](https://appshunter.io/ios/app/argus-pedometer-step-tracker/id624329444)

Track your steps, calories, sleep, and workouts all in one place. Compete with friends in fitness challenges to stay motivated and achieve your health goals. Log meals easily with photo recognition and barcode scanning.

**Highlights:** Automatic step tracking, Photo calorie counter, Sleep tracking with smart alarm, GPS activity tracking, Friend step challenges, Weight loss goal setting

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Azumio Premium | $4.99 | per month |
| Azumio Premium | $8.99 | per month |
| Azumio Premium | $9.99 | per month |
| Premium | $9.99 | per month |
| Premium | $9.99 | per month |
| Premium | $14.99 | per month |
| Azumio Premium | $29.99 | per year |
| Azumio Premium | $29.99 | per year |
| Premium | $29.99 | per year |
| Premium | $29.99 | per year |

**What reviewers like**

- 👍 Covers the basics
- 🚀 Efficient and easy to use
- 💡 Helpful challenges and social features
- 👍 Good for tracking exercise, sleep, and intake

**What reviewers complain about**

- 🐛 Buggy and crashes frequently
- 🔍 Limited food database and inaccurate nutritional info
- 💰 Premium features are overpriced
- 🔒 Privacy concerns around data sharing

**Reported bugs**

- Steps not tracking properly
- Syncing issues with Fitbit and other devices
- Frequent app crashes, especially on newer devices

**Requested features**

- Ability to manually enter micronutrients
- Better integration with wearables and other apps
- More customization options for tiles and dashboard
- Improved reporting and historical data tracking


### 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


## Frequently asked questions

### Is Argus free?

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

### Is UCSF Eureka Research free?

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

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

Argus is rated higher. Argus averages 4.9 out of 5 from 36K ratings, while UCSF Eureka Research averages 3.1 from 329 ratings.

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

Argus shows ads; UCSF Eureka Research does not.

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

Argus ships an update monthly, and UCSF Eureka Research every 5 weeks. Most recently, Argus was updated on September 27, 2026 and UCSF Eureka Research on September 4, 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.*