N2 Studios vs StressTracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
N2 Studios
Access your personalized member portal to sign up for classes, manage your membership, and stay updated on studio events. This application provides convenient access to all your studio needs.
- Personalized member portal
- Class sign-up
- Membership management
- Studio event updates
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Download this app and access your personalized member portal to sign up for classes, manage your membership, and stay in the know about the events of N2 Studios
StressTracker
This app analyzes heart data from your Apple Watch to assess psychological stress levels and monitor mental, emotional, and physical states. It provides detailed charts and intelligent reminders to help you understand and manage stress over time.
- AI-powered stress assessment
- HRV data analysis
- Multi-dimensional stress charts
- Intelligent stress reminders
- Apple Health integration
- Local data storage
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------------Designed for Apple Watch Users Stress Self-Assessment Tailored for Apple Watch Users: It analyzes your heart data and displays your current psychological stress levels, as well as your mental, emotional, and physical states. With your watch, it's a great tool for stress self-assessment, monitoring, and recording, as well as detecting stress. ------------Measure Psychological Stress Anytime When wearing your Apple Watch, it automatically generates HRV (heart rate variability) data. The Stress Self-Assessment App analyzes HRV data, combined with resting heart rate, age, and other factors, to provide a comprehensive stress assessment level. This process requires no intervention, but you can also use mindfulness apps or ECG apps on your watch for quick psychological stress tests and monitoring, obtaining HRV values and psychological stress status. ------------Multi-Dimensional Full-Cycle Data We provide multi-dimensional, full-cycle psychological stress data charts, allowing you to intuitively understand changes in stress trends and psychological pressure over longer periods. This includes weekly, monthly, and yearly stress trend charts, stress frequency statistics, stress period statistics, stress scatter plots, and more. We offer comprehensive psychological stress data charts to help you clarify the root causes of stress, manage emotions, and improve mental health. ------------Intelligent Psychological Stress Reminders With stress reminders, you can timely perceive changes in your psychological stress status. When new HRV data is generated, the Stress Self-Assessment App automatically sends a notification to your watch or phone, reminding you to pay attention to your psychological stress status and maintain good physical health. ------------Automatic Health Check-Ins Leveraging powerful Apple Health integration, we combine seven health habits including steps, sleep duration, mindfulness duration, hydration, hand washing, standing time, and energy burn. This helps you easily understand these data points, promoting robust physical health and a pleasant inner state. ------------Privacy and Security We understand your personal health data is sensitive. Stress Self-Assessment only directly reads data on your device via the Apple HealthKit API, and all your data is stored locally. ------------------------------------------------------------ Advanced Membership Subscription Explanation: By becoming an advanced member of Stress Self-Assessment, you unlock all paid features, enjoy free updates for future advanced functionalities, and a commitment to ad-free service. Upon Purchase Confirmation and Payment: Your subscription will be automatically renewed via your iTunes account. Apple iTunes will charge you within 24 hours prior to the end of the current period, extending the subscription period upon successful payment. To cancel the renewal, manage auto-renewal in iTunes/Apple ID settings at least 24 hours before the current period ends. During the trial period, if not canceled, your iTunes account will be charged and the trial period unused will be forfeited upon subscription purchase. This service allows you the choice to cancel, and if not canceled, it will automatically renew for the next billing period. User Agreement: https://fish.iibear.com/policy/ Privacy Policy: https://fish.iibear.com/private/ Disclaimer: Data and statements from the Stress Self-Assessment App do not constitute medical advice, diagnosis, or treatment for any individual or patient case. They should not replace professional medical advice, diagnosis, or treatment. If you experience any discomfort, whether physical or psychological, seeking timely medical attention is recommended.
Screenshots
Verdict
The clearest difference is review sentiment: StressTracker at 75% against N2 Studios's 0%. StressTracker also leads on rating (4.7 vs 3.8) and update cadence (every 2 weeks vs every 15 months). N2 Studios's advantage is in-app purchases (none vs 10) and iOS requirement (9.0.0 vs 15.0). On price, ads 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. StressTracker sells 9 in-app purchases, starting at $4.99 per 7 days. N2 Studios asks for nothing beyond the download.
StressTracker holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: StressTracker has 444 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 0% of N2 Studios's written reviews are positive against 75% of StressTracker's.
N2 Studios ships an update every 15 months, StressTracker every 2 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | N2 Studios | StressTracker |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (5 ratings) | 4.7 (444 ratings) — better |
| Positive reviews | 0.0% of reviews | 75.4% of reviews — better |
| Number of ratings | 5 | 444 — better |
| Update frequency | Every 15 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Requires iOS | 9.0.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 20 MB | 112 MB |
| Age rating | 4+ | 12+ |
| Developer | N2 Holding Corporation | 赞美 陈 |
Customer experience
N2 Studios
StressTracker
Bugs and requests
N2 Studios
Not enough reviews yet to summarise bugs or requests.
StressTracker
Reported bugs
10 issues- App not working with Apple Series 3
- Promotional price not applied
- Data missing after upgrade
- Feedback submission failed
- Cannot contact customer service
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- Membership not synced across devices
- Inconsistent data between phone and watch
- Questions switch between English and Chinese
- Pop-up boxes in foreign languages
- Paid version lost after update
Requested features
15 requests- Real-time updates
- Increased frequency of readings/customizable frequency
- Ability to manually trigger HRV
- Improved notifications for high stress
- Dark mode option
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- Free trial for premium features
- Ability to change language manually
- Add female health features (e.g., period tracking)
- Add water reminder function
- Ability to change themes on Apple Watch directly
- More frequent testing
- Add a text素材库 for pressure status with corresponding watch themes
- Display specific step count, sleep quality, and sun exposure time on watch face
- Allow users to customize the frequency of HRV measurement
- Add a feature to clear private messages with one click
In-app purchases
N2 Studios
No in-app purchases
StressTracker
- Weekly Pro3 Days trial$4.997 Days
- Weekly Pro$4.997 Days
- Monthly Pro$14.991 Month
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- Annual$29.991 Year
- Quarter VIP$34.993 Months
- Annual Pro$39.991 Year
- VIP Member2 variants$22.99
- Lifetime Pro$99.99
- 终身会员VIP$99.99









