Your Stressy
Your energy. One number.
$3.99
Stressy turns what your Apple Watch already measures into one number: your reserve, from 0 to 100%.
Sleep fills it. Stress drains it. Calm slows it down. Glance at your wrist or your iPhone and you know how much you have left today.
YOUR MORNING STARTS WITH YOUR NIGHT
Deep sleep refills your reserve fastest. Stressy reads how your heart and HRV recovered overnight against your own usual, so a short or restless night starts you lower and a good one starts you high.
THROUGH THE DAY
Every five minutes, your heart is compared with your own calm. Stress drains the reserve in proportion to how stressed you are, calm slows the drain, and mindful minutes recharge it. Workouts and walks count as effort, never as stress.
SEE EXACTLY WHY
Today shows your whole day in one curve, your stress every five minutes, every activity with what it cost or gave back, and Behind the number: where yesterday ended, last night's recovery, and where your reserve went since you woke up.
LOOK AHEAD
• Readiness: whether today suits hard training, from your reserve, recovery, sleep and recent training. Plan a workout and see tomorrow's wake-up with and without it.
• Bedtime coach: the latest bedtime that still wakes you at 100, 90 or 80%, on a Liquid Glass dial.
YOUR WHOLE DAY
• Steps: your steps and distance hour by hour and across the week.
• Sleep: every stage of the night, deep, core and REM, with the time in each and how your body recovered.
• Workouts: the route on a map, time, distance, pace, heart rate and its zones, and what the workout cost your reserve.
• Stories: turn your steps, sleep or a workout into a video or image for Instagram and anywhere else, made right on your iPhone.
ON YOUR WRIST AND EVERY SCREEN
The living tank on Apple Watch, complications and the Smart Stack, plus widgets for your Home Screen and Lock Screen, including today's stress in detail, as bars or as a flowing line, and your steps or distance.
DESIGNED FOR iOS 26 AND LATER
A living liquid tank, glass numbers that hold their own liquid, and Liquid Glass throughout. Light and dark appearance, Dynamic Type, VoiceOver and Reduce Motion.
PRIVATE BY DESIGN
No account. No servers. No analytics. No ads. Your health data is read on your iPhone and Apple Watch and never leaves them. One price, no subscription.
WHAT YOU NEED
An iPhone and an Apple Watch. Stressy reads sleep, heart rate, heart rate variability, resting heart rate, workouts and their routes, distance, active energy, steps and mindful minutes from Apple Health, plus your age and sex for your heart rate zones. Wear your watch to sleep for the best results; your personal baseline settles in within about a week.
Stressy is a wellness app, not a medical device. Your reserve is an estimate to help you notice how sleep, stress and rest shape your day.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
After midnight Stressy now moves straight on to the new day, even when it stayed open in the background. Steps and distance match the Health app's own totals.
The developer, Ervo Labs, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ervo Labs
- Size
- 18.9 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Apple Watch
Requires watchOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © 2026 Ervo Labs
