Precision AIM vs BiAffect3
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Precision AIM
This app delivers randomized motivational messages throughout the day to encourage increased physical activity. Participants log in with a research-provided username and must enable notifications and location services to receive messages. The app's primary function is to facilitate a research study on message-based motivation.
- Randomized motivational messages
- Physical activity encouragement
- Research study participation
- Notification and location services required
- Simple home screen interface
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This application is for an academic research study about how random daily messages influence participants' motivation to increase their physical activity. The purpose of this application is to receive messages sent at random times each day that provide motivation to increase physical activity. When you first open the app, you will be prompted to login with a username give to you by the research team. After login please complete: 1. Allow notifications: You must select "Allow" 2. Always allow location: You must select "Always Allow" You will begin receiving randomly scheduled messages the next day. Opening the application presents a home screen. There is no other user-facing functionality aside from receiving messages.
BiAffect3
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.
- Mood tracking
- Neurocognitive functioning assessment
- Keystroke dynamics analysis
- Sensor data collection
- Mental health insights
- Research participation
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BiAffect3 is the new and improved version of our award-winning BiAffect app, part of a multi-year mood-tracking research project developed by researchers at the University of Illinois at Chicago and funded by the National Institute of Mental Health. BiAffect3 • Track your mood and neurocognitive functioning with your iPhone. • Use keystroke dynamics and sensor data to gain insights into your mental health. • Help researchers develop new tools to improve the diagnosis and treatment of mood disorders. How does it work? BiAffect3 uses a custom-built virtual smartphone keyboard to collect keystroke metadata—such as typing speed, errors, and pauses—but not typed content in order to preserve user privacy. This data is then analyzed using machine learning algorithms and other statistical techniques to identify patterns that are associated with different mood states. Who is BiAffect3 for? BiAffect3 is for anyone who is interested in tracking their mood and neurocognitive functioning. The app is particularly useful for people with mood disorders as it can help them to identify early warning signs of an episode and take steps to prevent it, but it can be used by anyone who wants to learn more about their individual emotional and thought patterns. How do I get started? To get started with BiAffect3, simply download the app and create an account. The app will then guide you through the setup process. How can I help? By participating in the BiAffect3 study, you can help researchers develop new tools to improve the diagnosis and treatment of bipolar disorder. Your participation is voluntary and confidential. Download BiAffect3 today and start tracking your mood and neurocognitive functioning.
Screenshots
Verdict
The clearest difference is rating: BiAffect3 at 5.0 against Precision AIM's 3.7. BiAffect3 also leads on update cadence (every 4 months vs every 64 months) and iOS requirement (16.1 vs 18.2). On price, ratings volume, ads and in-app purchases 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.
BiAffect3 holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 6 respectively.
Precision AIM ships an update every 64 months, BiAffect3 every 4 months. The most recent releases landed on September 24, 2026 and October 7, 2026 respectively.
| Parameter | Precision AIM | BiAffect3 |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 3 | 6 — better |
| Update frequency | Every 64 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 18.2 | 16.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 30 MB |
| Age rating | 4+ | 17+ |
| Developer | SDC Insights, LLC | University of Illinois |
Customer experience
Precision AIM
BiAffect3
In-app purchases
Precision AIM
No in-app purchases
BiAffect3
No in-app purchases








