# Castor Connect vs Applied Admin

The clearest difference is iOS requirement: Castor Connect at 13.0 against Applied Admin's 18.0. 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.

Castor Connect ships an update every 2 months, Applied Admin every 5 weeks. The most recent releases landed on September 16, 2026 and July 5, 2026 respectively.

## The numbers

| Metric | Castor Connect | Applied Admin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/applied-admin/id1671675625/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 28 MB | 33 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Ciwit B.V.](https://appshunter.io/developer/1009756772) | [Applied Cognition Inc](https://appshunter.io/developer/1544428926) |

## What reviewers say

### Castor Connect

[App page](https://appshunter.io/ios/app/castor-connect/id1532340302)

This app allows study participants to securely complete electronic patient-reported outcome (ePRO) questionnaires on their mobile devices. It offers offline data storage and manual syncing for flexibility. Access requires an invitation or activation code.

**Highlights:** ePRO questionnaire completion, Offline data storage, Manual data sync, Secure participant data, Native mobile application

**In-app purchases:** none


### Applied Admin

[App page](https://appshunter.io/ios/app/applied-admin/id1671675625)

This clinical research application supports patient enrollment and device setup for specific investigational studies. It is designed exclusively for participants in IRB-approved clinical trials sponsored by Applied Cognition, Inc. All collected health information is protected under HIPAA regulations.

**Highlights:** Clinical study enrollment support, Investigational device setup, HIPAA-compliant data protection, Requires prior study consent, For IRB-approved research only

**In-app purchases:** none


## Frequently asked questions

### Is Castor Connect free?

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

### Is Applied Admin free?

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

### Do Castor Connect or Applied Admin have ads?

Neither Castor Connect nor Applied Admin shows ads.

### Which is updated more often, Castor Connect or Applied Admin?

Castor Connect ships an update every 2 months, and Applied Admin every 5 weeks. Most recently, Castor Connect was updated on September 16, 2026 and Applied Admin on July 5, 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.*