# YPrime vs CSL787_2001

The clearest difference is iOS requirement: CSL787_2001 at 12.0 against YPrime's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

YPrime ships an update every 3 weeks, CSL787_2001 every 4 weeks. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | YPrime | CSL787_2001 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/yprime/id1659475338/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | Free | — |
| Size | 110 MB | 82 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Y-Prime](https://appshunter.io/developer/872635320) | [ERT, INC](https://appshunter.io/developer/1160214546) |

## What reviewers say

### YPrime

[App page](https://appshunter.io/ios/app/yprime/id1659475338)

Manage your clinical study tasks conveniently from your personal device. Log in using your enrollment ID to complete training and stay connected to your study activities, fitting them into your daily schedule.

**Highlights:** Log in and review study tasks, Complete clinical study activities, Manage tasks at your own pace, Stay connected to your study, Use on personal devices

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

**In-app purchases:** none


### CSL787_2001

[App page](https://appshunter.io/ios/app/csl787-2001/id6740516302)

**In-app purchases:** none


## Frequently asked questions

### Is YPrime free?

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

### Is CSL787_2001 free?

CSL787_2001 is free to download, with no in-app purchases.

### Do YPrime or CSL787_2001 have ads?

Neither YPrime nor CSL787_2001 shows ads.

### Which is updated more often, YPrime or CSL787_2001?

YPrime ships an update every 3 weeks, and CSL787_2001 every 4 weeks. Most recently, YPrime was updated on October 30, 2026 and CSL787_2001 on October 25, 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.*