Alfin vs DXJ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Alfin
This medical application serves as an interface for controlling a specific headband device, ensuring its correct operation for clinical research. It is designed exclusively for healthcare professionals and researchers, not general consumers. The app prioritizes user privacy by not collecting personal health data.
- Headband control interface
- Ensures proper device functioning
- Clinical purposes only
- No personal health data collection
- Compatible with various iOS devices
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Please be advised that this app version is destined for clinical purposes only. It is not adapted for general consumers using the Dreem headband. Dreem works closely with the research community to facilitate pioneering studies and push the boundaries of science. For more information, please go to: https://dreem.com/en/healthcare?hlth=researcher Alfin is an interface that allows you to control the Dreem headband and ensure its proper functioning. Also, Alfin never collects your personal health data. Compatible iOS devices: iPhone 5s or more recent iPod Touch 6th generation or more recent iPad 2nd generation or more recent; all kinds of iPad Mini Compatible versions of iOS: iOS 12.0 or more recent This app is available in English
DXJ
Share your health journey and earn cash by completing short, monthly surveys. Your anonymous responses contribute to healthcare research while you get paid via Venmo. Privacy is paramount, with no personal information ever sold.
- Share disease journey
- Earn cash rewards
- Short monthly surveys
- Anonymous patient responses
- Secure and private
- Cancel anytime
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DXJ gives you the power to share your disease journey and make a difference. The DXJ app allows you to share the life events that occur along your disease journey and earn cash by answering quick monthly surveys. Designed for ease of use, it takes just a few minutes to complete each survey, and you'll be compensated via Tremendous. Your privacy is our top priority—no personal information is ever sold. Features: - Short and simple surveys/10 questions - Monthly updates with new questions - Anonymous patient responses - Secure and private - Earn cash rewards - Cancel anytime with ease How It Works: 1. Download app and register with a valid US ID. 2. Complete Background Profile/no personal information 3. Answer brief surveys about your health. 4. Earn cash rewards starting at $2 per survey (Rewards sent via email) Join DXJ today and make your voice heard in the healthcare industry while earning rewards! Privacy: Your data is protected. We do not sell your personal identifiable data. When you take a survey on DXJ, your answers are aggregated and shared with the company who wrote the survey questions. DXJ does not keep your ID information with the exception of your name to match with the name on your prescription . The survey data shared with companies whose medicine you take, is anonymous and not linked to any of your personal identifiable information. For more information regarding the privacy and terms of conditions for DXJ, review the privacy policy and terms and conditions on our app. The DXJ app is free to download and use.
Screenshots
Verdict
The clearest difference is rating: Alfin at 5.0 against DXJ's 2.3. Alfin also leads on iOS requirement (12.0 vs 15). DXJ's advantage is ratings volume (55 vs 1) and update cadence (every 2 weeks vs every 3 months). On price, ads, in-app purchases and monetization model 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.
Alfin holds the better App Store score, 5.0 against 2.3. That said, the two scores are not equally well evidenced: DXJ has 55 ratings behind it against 1, so its average is the more settled of the two.
Alfin ships an update every 3 months, DXJ every 2 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.
| Parameter | Alfin | DXJ |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 2.3 (55 ratings) |
| Positive reviews | — | 13.9% of reviews |
| Number of ratings | 1 | 55 — better |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 15 |
| Further details — not scored | ||
| Size | 70 MB | 65 MB |
| Age rating | 4+ | 4+ |
| Developer | Beacon Biosignals | rXperius |
Customer experience
Alfin
DXJ
Bugs and requests
Alfin
Not enough reviews yet to summarise bugs or requests.
DXJ
Reported bugs
16 issues- Failed to send payment
- Cannot update app
- Rewards center not working
- Account details not visible/changeable
- Apple Health connection issues
Show 11 moreShow fewer
- Surveys broken/cannot complete
- Error when submitting surveys
- Notifications for surveys but none available
- App won't open after password input
- Cannot claim payments
- Cannot take surveys
- Payment pending/not accepted
- Surveys locked after 7 days
- App not working since last month
- Cannot scan ID/DL
- App down/cannot sign in
Requested features
6 requests- Fix payment issues
- Improve customer support responsiveness
- Revert survey payout to $3
- Make surveys accessible again
- Fix app login issues
Show 1 moreShow fewer
- Allow reconnection to Apple Health
In-app purchases
Alfin
No in-app purchases
DXJ
No in-app purchases
