Castor Connect vs Solanx
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- ePRO questionnaire completion
- Offline data storage
- Manual data sync
- Secure participant data
- Native mobile application
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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
Solanx
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Solanx brings a more integrated approach to modern healthcare, connecting you with complementary and holistic services designed to support your health and well-being. Our mission is to make integrative, preventive, and accessible care easier to discover and engage with. Through a growing network of contracted providers, Solanx connects you with a range of services and wellness approaches that complement modern healthcare. With Solanx, you can: • Explore available healthcare and wellness services • Discover providers within the Solanx network • Learn about complementary and holistic approaches to care • Find services that may support chronic-condition management • Stay connected with your healthcare and wellness journey • Access care options designed around a more comprehensive approach to health Solanx brings together modern healthcare and thoughtfully selected complementary services to help individuals take a more active role in their health and well-being. Our approach is grounded in science and expanded through holistic care. We continuously evaluate new therapies and work with providers who share our commitment to quality, accessibility, and better health outcomes. Whether you are looking for complementary services, exploring options for ongoing wellness, or seeking additional support as part of your healthcare journey, Solanx is here to help you discover a more integrated approach to care. Solanx — Integrative. Preventive. Accessible.
Screenshots
Verdict
The clearest difference is update cadence: Solanx at every 2 weeks against Castor Connect's every 2 months. Castor Connect's advantage is iOS requirement (13.0 vs 15.0). 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
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, Solanx every 2 weeks. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.
| Parameter | Castor Connect | Solanx |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 28 MB | 25 MB |
| Age rating | 4+ | 17+ |
| Developer | Ciwit B.V. | BISIL |
In-app purchases
Castor Connect
No in-app purchases
Solanx
No in-app purchases
Questions
Is Castor Connect free?
Is Solanx free?
Do Castor Connect or Solanx have ads?
Which is updated more often, Castor Connect or Solanx?
Other comparisons
