# SmarTrial vs ZEUS Study App (EX6018

SmarTrial and ZEUS Study App (EX6018 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

SmarTrial ships an update every 3 weeks, ZEUS Study App (EX6018 monthly. The most recent releases landed on September 15, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | SmarTrial | ZEUS Study App (EX6018 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zeus-study-app-ex6018-4758/id1568354892/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | — | Free |
| Size | 48 MB | 76 MB |
| Requires iOS | **13.0** | 13.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [ACTIVAID K.K.](https://appshunter.io/developer/1515234653) | [Medable, Inc.](https://appshunter.io/developer/660544651) |

## What reviewers say

### SmarTrial

[App page](https://appshunter.io/ios/app/smartrial/id1563673014)

**Features:** macOS Compatibility

**In-app purchases:** none


### ZEUS Study App (EX6018

[App page](https://appshunter.io/ios/app/zeus-study-app-ex6018-4758/id1568354892)

This medical app is exclusively for participants of the Zeus (EX6018-4758) study. It utilizes HealthKit and ResearchKit to facilitate clinical trials.

**Highlights:** Study participant exclusive access, HealthKit integration, ResearchKit library utilization, Clinical trial data collection, Secure data management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SmarTrial free?

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

### Is ZEUS Study App (EX6018 free?

ZEUS Study App (EX6018 is free to download, with no in-app purchases.

### Do SmarTrial or ZEUS Study App (EX6018 have ads?

Neither SmarTrial nor ZEUS Study App (EX6018 shows ads.

### Which is updated more often, SmarTrial or ZEUS Study App (EX6018?

SmarTrial ships an update every 3 weeks, and ZEUS Study App (EX6018 monthly. Most recently, SmarTrial was updated on September 15, 2026 and ZEUS Study App (EX6018 on October 22, 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.*