Comparison

Castor Connect vs REACH

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Castor Connect

Engage, Participate, Connect!

About

Castor Connect

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

Read full description

Castor Connect enables study participants to complete Castor Surveys (ePRO questionnaires) via a native mobile application. - Compliant, secure, user-friendly ePRO solution - Configured using our EDC product to be as simple or complex as your study demands - Flexible and secure, offline data storage with manual sync and native security mean participants can submit their study data whenever they need An invitation to take part or the scanning of a participant-specific activation code is required to use this application. You can find more information about Castor surveys or Castor Connect at castoredc.com/epro

About

REACH

Features

Read full description

This is a companion app for REACH tDCS Study.

Screenshots

Castor Connect3 screens

REACH4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard1 real difference · 6 level

Castor Connect versus REACH: the parameters behind the verdict, then further details
Parameter	Castor Connect	REACH
Price	Free	Free
Update frequency	Every 2 months — better	Every 4 months
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	13.0	13.0
Further details — not scored
Size	28 MB	35 MB
Age rating	4+	17+
Developer	Ciwit B.V.	Sooma Oy

In-app purchases

None

Castor Connect

No in-app purchases

None

REACH

No in-app purchases

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.