3E Smartphone Substudy vs m
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
3E Smartphone Substudy
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Your participation in this study is completely voluntary. If you choose to participate, you will be asked to (1) download the 3E Smartphone Substudy app and allow sharing of your smartphone data and (2) complete short, daily surveys for 9 days in a row. Surveys will be administered in the 3E Smartphone Substudy app and take ~5 minutes to complete. The surveys will include questions about your sleep, physical activity, and other health behaviors that day. The app will collect information from your smartphone’s built-in GPS, accelerometer, and gyroscope sensors to give us information on your movement (e.g., steps and distance traveled). It will also collect general screen time and app usage data (e.g., how long you use). It will NOT collect information from your text messages, phone calls, or your apps beyond which app you are using and for how long (e.g., Spotify for 50 min). If you choose to participate, we will ask you to complete this process 1-2 times per year. You will receive up to $35 for completing the 3E Smartphone Substudy.
m
This application collects data through questionnaires and device sensors to provide a comprehensive view of user responses and context. It allows administrators to set up data collection schedules and protocols for participants.
- Questionnaire-based data collection
- Sensor data integration (location, movement, steps)
- Scheduled data collection protocols
- Administrator-defined settings
- Detailed user data profiling
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m-Path Sense is a tool to monitor individuals, using a vast array of questionnaires and sensors. An administrator can set up protocols to collect data through questionnaires and sensors, which you will then be invited to answer according to a set schedule. Sensor data (including location, movement and step count) can be collected to provide context to these responses, to create a full and detailed image of the data you provide.
Screenshots
Verdict
The clearest difference is update cadence: 3E Smartphone Substudy at every 3 weeks against m's every 2 months. On price, ads, in-app purchases and device support 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.
3E Smartphone Substudy ships an update every 3 weeks, m every 2 months. The most recent releases landed on September 18, 2026 and September 13, 2026 respectively.
| Parameter | 3E Smartphone Substudy | m |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.3 (6 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 6 — better |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.5 — better |
| Further details — not scored | ||
| Size | 50 MB | 110 MB |
| Age rating | 4+ | 12+ |
| Developer | Avicenna Research Inc. | m-Path Software |
In-app purchases
3E Smartphone Substudy
No in-app purchases
m
No in-app purchases









