# Castor Connect vs REACH

The clearest difference is update cadence: Castor Connect at every 2 months against REACH's every 4 months. On price, ads, in-app purchases and device support 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, REACH every 4 months. The most recent releases landed on September 16, 2026 and June 24, 2026 respectively.

## The numbers

| Metric | Castor Connect | REACH |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | — |
| Size | 28 MB | 35 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Ciwit B.V.](https://appshunter.io/developer/1009756772) | [Sooma Oy](https://appshunter.io/developer/1608009366) |

## 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


### REACH

[App page](https://appshunter.io/ios/app/reach-tdcs-study/id6502997289)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Castor Connect free?

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

### Is REACH free?

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

### Do Castor Connect or REACH have ads?

Neither Castor Connect nor REACH shows ads.

### Which is updated more often, Castor Connect or REACH?

Castor Connect ships an update every 2 months, and REACH every 4 months. Most recently, Castor Connect was updated on September 16, 2026 and REACH on June 24, 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.*