Open Bridge vs BiAffect3
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Open Bridge
Contribute your data to scientific research studies focused on cognition. Complete scheduled activities, similar to puzzles or memory tests, directly on your phone. Your identity is protected as the app collects data solely for research purposes.
- Contribute data for research studies
- Complete scheduled cognitive activities
- Activities resemble puzzles and memory tests
- Data used solely for research
- Protects user identity
- Developed by non-profit research organizations
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Open Bridge is for adults ages 18+ to collect data for research studies. The Open Bridge app lets you contribute data for research. It is used by many research organizations who study cognition. If you choose to join a Open Bridge study, you will use the free app to complete activities on your phone on a pre-set schedule. The activities may resemble puzzles, or they may test your memory. The data collected from the activities help researchers learn more about cognition. Your data will only be used for research. We will not collect your name through the app. This helps protect your identity. Every research study is different, but most studies will take about 30-40 minutes each week and will last for different lengths of time. If you are already part of a Mobile Toolbox study, you can contact your Study Coordinator if you have questions about the study you have joined. Sage Bionetworks, a non-profit research organization in the USA, developed the Open Bridge app. Washington University and Sage Bionetworks developed the activities on the app. Open Bridge supports research studies. It does not provide medical advice, diagnosis, or treatment.
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 update cadence: Open Bridge at every 5 weeks against BiAffect3's every 4 months. On price, rating, ratings volume and ads 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.
On the App Store both sit at effectively the same score — 5.0 for Open Bridge against 4.9 for BiAffect3. Both are backed by a comparable volume of ratings — 5 and 7 respectively.
Open Bridge ships an update every 5 weeks, BiAffect3 every 4 months. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.
| Parameter | Open Bridge | BiAffect3 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | 4.9 (7 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 5 | 7 — better |
| Update frequency | Every 5 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 16.4 | 16.1 — better |
| Further details — not scored | ||
| Size | 41 MB | 30 MB |
| Age rating | 4+ | 17+ |
| Developer | Sage Bionetworks, a Not-For-Profit Research Organization | University of Illinois |
Customer experience
Open Bridge
BiAffect3
In-app purchases
Open Bridge
No in-app purchases
BiAffect3
No in-app purchases









