StressTracker vs Hydra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StressTracker
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Stress AI Tracker – Understand & Manage Your Stress with Apple Watch Your Apple Watch knows more than just your steps—it also knows when you're stressed. Stress AI Tracker reads your HRV (Heart Rate Variability), heart rate, and other data from Apple Health to help you understand how your body reacts to everyday life. No complicated dashboards. No noise. Just simple, intelligent insights—powered by your own data. How Stress AI Tracker Helps Real-Time Stress Awareness Stay connected to your body. Get notified when your HRV or resting heart rate shows signs of stress. Daily AI-Generated Messages Receive gentle, personalized suggestions based on your physiological state—rooted in science, designed to support your mental and physical balance. Weekly & Monthly Stress Trends Track how your stress evolves over time. Understand what habits, patterns, or activities may be contributing to your well-being. Thoughtful Reminders Whether you're working late, out of routine, or just feeling off—Stress AI Tracker encourages you to pause, recharge, and stay grounded. Apple Watch + HealthKit Integration Stress AI Tracker runs quietly in the background. No manual input needed. Just wear your Apple Watch and go about your day. Designed to Be Clear, Calm & Helpful Not everyone is a scientist. That’s why we turn complex data into short, actionable insights. Stress AI Tracker helps you build awareness and make better decisions—without overwhelming you with charts or jargon. Privacy Comes First Your data stays yours. We never store your personal health data on external servers. Everything is securely handled through Apple Health. No accounts. No ads. No third-party analytics. Just peace of mind. Wellness Disclaimer Stress AI Tracker is intended to support general wellness and stress awareness. It does not offer medical diagnoses or treatment. For serious or persistent concerns, please consult a healthcare professional. Contact Us: info@floude.com Privacy Policy: https://floude.com/privacy-policy Terms of Use: https://floude.com/terms-of-use
Hydra
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Stay hydrated. Stay healthy. Stay motivated. Hydra makes drinking water simple and fun with smart reminders, personalized daily goals, and playful visuals that grow as you do. Why Hydra? - Personalized goals – Set your hydration target based on your weight, activity, and climate. - Smart reminders – Gentle nudges only when you forget, not when you don’t need them. - Fun visuals – Watch your water drop change mood as you progress. - Custom units – Track in milliliters or ounces, whichever you prefer. - History & stats – Stay motivated with streaks, charts, and calendar view. - Log flexibility – Add water in one tap, or backfill previous days. - Share progress – Inspire friends by sharing your hydration streak. Hydra is your everyday hydration companion, helping you build healthy habits that last. Drink more water, feel better, and celebrate every sip! Terms of Use : https://docs.google.com/document/d/1L39-ZwqprKT-KU5KxO7sfgZeDnqwcNW3uvf2wJ_lKGM/edit?tab=t.0#heading=h.m4qldp55qjhd Privacy Policy : https://docs.google.com/document/d/1PRwKSTVWL17rrGDhZZ8yF7oP-vU7BIVfeVrskT7CEv8/edit?tab=t.0#heading=h.3hqjbmiuocvt
Screenshots
Verdict
The clearest difference is device support: Hydra at 3 against StressTracker's 1. Hydra also leads on iOS requirement (15.0 vs 17.0). On price, 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. StressTracker sells 2 in-app purchases, starting at $5.99 per 7 days and Hydra sells 6 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | StressTracker | Hydra |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Fortnightly |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 75 MB |
| Age rating | 17+ | 12+ |
| Developer | Floude LLC | ANASTASIYA BATURYNA |
In-app purchases
StressTracker
- 1 Week Subscription$5.997 Days
- 1 Year Subscription$49.991 Year
Hydra
- VIP Monthly$5.991 Month
- VIP Monthly 3 days free3 Days trial$5.991 Month
- VIP Yearly 85% Off$10.991 Year
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- VIP Annual$29.991 Year
- VIP Annual 7 days free$49.991 Year
- VIP Lifetime$29.99









