# RePS Study vs BiAffect3

The clearest difference is rating: BiAffect3 at 5.0 against RePS Study's 1.7. On price, ratings volume, update cadence and ads there is nothing between them.

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

BiAffect3 holds the better App Store score, 5.0 against 1.7. Both are backed by a comparable volume of ratings — 13 and 6 respectively.

RePS Study ships an update every 3 months, BiAffect3 every 4 months. The most recent releases landed on July 23, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | RePS Study | BiAffect3 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.7 (13 ratings)](https://appshunter.io/ios/app/reps-study/id6445924881/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/biaffect3/id6451423106/reviews)** |
| Number of ratings | **13** | 6 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | Free |
| Size | 24 MB | 30 MB |
| Requires iOS | **15.0** | 16.1 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 17+ |
| Developer | [NEUROSCAPE ALLIANCE](https://appshunter.io/developer/1459562932) | [University of Illinois at Urbana-Champaign](https://appshunter.io/developer/422670617) |

## What reviewers say

### RePS Study

[App page](https://appshunter.io/ios/app/reps-study/id6445924881)

This mobile program guides users through an eight-week self-help training to reduce posttraumatic stress symptoms. It involves daily engagement for 17 days, tracking behaviors, moods, and experiences, with follow-up measures administered through the app.

**Highlights:** Eight-week self-help training, Daily behavior tracking, Mood monitoring, Experience logging, Follow-up measures

**Features:** macOS Compatibility

**In-app purchases:** none


### BiAffect3

[App page](https://appshunter.io/ios/app/biaffect3/id6451423106)

This app helps you track your mood and cognitive function using your iPhone's keyboard and sensor data. It analyzes typing patterns to provide insights into mental health and assists researchers in developing better diagnostic tools for mood disorders.

**Highlights:** Mood tracking, Neurocognitive functioning assessment, Keystroke dynamics analysis, Sensor data collection, Mental health insights, Research participation

**In-app purchases:** none


## Frequently asked questions

### Is RePS Study free?

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

### Is BiAffect3 free?

BiAffect3 is free to download, with no in-app purchases.

### Which has better reviews, RePS Study or BiAffect3?

BiAffect3 is rated higher. RePS Study averages 1.7 out of 5 from 13 ratings, while BiAffect3 averages 5.0 from 6 ratings.

### Do RePS Study or BiAffect3 have ads?

Neither RePS Study nor BiAffect3 shows ads.

### Which is updated more often, RePS Study or BiAffect3?

RePS Study ships an update every 3 months, and BiAffect3 every 4 months. Most recently, RePS Study was updated on July 23, 2026 and BiAffect3 on June 4, 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.*