# Castor Connect vs Full Signal

The clearest difference is in-app purchases: Castor Connect at none against Full Signal's 2. Castor Connect also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). Full Signal's advantage is update cadence (weekly vs every 2 months). On price and ads there is nothing between them.

Both are free to download. Full Signal sells 2 in-app purchases, starting at $4.99 per month. Castor Connect asks for nothing beyond the download.

Castor Connect ships an update every 2 months, Full Signal weekly. The most recent releases landed on October 25, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Castor Connect | Full Signal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/full-signal/id6761782702/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Subscription |
| Size | 28 MB | 2 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ciwit B.V.](https://appshunter.io/developer/1009756772) | [TRISTAN ROBERT NOHRER](https://appshunter.io/developer/1867263550) |

## 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


### Full Signal

[App page](https://appshunter.io/ios/app/full-signal/id6761782702)

This app helps individuals on GLP-1 therapies maintain consistency with their weekly medication and understand their body's responses. It offers simple check-ins, shot reminders, and pattern insights without the burden of extensive logging.

**Highlights:** Weekly shot tracking, Routine reminders, Quick body check-ins, Pattern insights, Optional health data integration, Data export (JSON/CSV)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Signal Monthly | $4.99 | per month |
| Full Signal Yearly | $49.99 | per year |


## Frequently asked questions

### Is Castor Connect free?

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

### Is Full Signal free?

Full Signal is free to download, with in-app purchases available.

### Do Castor Connect or Full Signal have ads?

Neither Castor Connect nor Full Signal shows ads.

### Which is updated more often, Castor Connect or Full Signal?

Castor Connect ships an update every 2 months, and Full Signal weekly. Most recently, Castor Connect was updated on October 25, 2026 and Full Signal on October 22, 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.*