# Castor Connect vs FIFO Positivity

The clearest difference is update cadence: FIFO Positivity at every 9 days against Castor Connect's every 2 months. Castor Connect's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and monetization model 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, FIFO Positivity every 9 days. The most recent releases landed on October 25, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Castor Connect | FIFO Positivity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fifo-positivity/id6756440793/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 28 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ciwit B.V.](https://appshunter.io/developer/1009756772) | [Brandon Paikoff](https://appshunter.io/developer/1860701163) |

## 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


### FIFO Positivity

[App page](https://appshunter.io/ios/app/fifo-positivity/id6756440793)

This app helps you cultivate a daily mindfulness practice by managing your 10 most recent positive experiences. It automatically archives older entries, offers customizable reminders for reflection, and keeps all your memories in a secure, searchable archive.

**Highlights:** FIFO queue for 10 recent positive moments, Automatic archiving of older experiences, Customizable daily reflection reminders, Searchable archive of all past entries, Privacy-focused, on-device data storage, Simple interface with calming design

**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 FIFO Positivity free?

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

### Do Castor Connect or FIFO Positivity have ads?

Neither Castor Connect nor FIFO Positivity shows ads.

### Which is updated more often, Castor Connect or FIFO Positivity?

Castor Connect ships an update every 2 months, and FIFO Positivity every 9 days. Most recently, Castor Connect was updated on October 25, 2026 and FIFO Positivity on October 12, 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.*