# BiAffect3 vs Project DEDUCE

The clearest difference is update cadence: Project DEDUCE at every 2 weeks against BiAffect3's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

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

BiAffect3 ships an update every 4 months, Project DEDUCE every 2 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | BiAffect3 | Project DEDUCE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/biaffect3/id6451423106/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 30 MB | 72 MB |
| Requires iOS | 16.1 | **16.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [University of Illinois](https://appshunter.io/developer/422670617) | [Avicenna Research Inc.](https://appshunter.io/developer/1137173051) |

## What reviewers say

### 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


### Project DEDUCE

[App page](https://appshunter.io/ios/app/project-deduce/id6758643251)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BiAffect3 free?

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

### Is Project DEDUCE free?

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

### Do BiAffect3 or Project DEDUCE have ads?

Neither BiAffect3 nor Project DEDUCE shows ads.

### Which is updated more often, BiAffect3 or Project DEDUCE?

BiAffect3 ships an update every 4 months, and Project DEDUCE every 2 weeks. Most recently, BiAffect3 was updated on October 24, 2026 and Project DEDUCE on October 24, 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.*