Open Bridge vs Ventos
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.
Ventos
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The app is designed to communicate with our device that measures your gut microbiome activity via flatus. The app is use to track your food intake while measuring your microbiome activity. DISCLAIMER: This app and the Ventos device are for general wellness purposes only. Seek a doctor’s advice in addition to using this app and before making any medical decisions. For more information visit our peer review article: https://doi.org/10.1016/j.biosx.2025.100699
Screenshots
Verdict
The clearest difference is device support: Ventos at 3 against Open Bridge's 1. Ventos also leads on iOS requirement (12.0 vs 16.4). On price, update cadence, 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.
Both ship on a similar rhythm, roughly every 5 weeks. Both last shipped on October 6, 2026.
| Parameter | Open Bridge | Ventos |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 41 MB | 83 MB |
| Age rating | 4+ | 4+ |
| Developer | Sage Bionetworks, a Not-For-Profit Research Organization | Ventoscity LLC |
In-app purchases
Open Bridge
No in-app purchases
Ventos
No in-app purchases
