Stress Watch: HRV Mood Monitor

Relax, Body Battery & Tracker

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Stress Meter shows the heart rate variability (HRV) your Apple Watch already records, next to your own usual range, and always tells you when it was measured. Is 42 ms good? It depends on you. Stress Meter compares each reading only with your last four weeks, so the number finally means something. HONEST READINGS • Your latest HRV in milliseconds, with the time it was measured • Older readings are marked "not current", never shown as live • A plain strain estimate from your HRV: higher than usual, typical for you, or lower than usual • No score, no diagnosis, no made-up numbers when there is no data YOUR OWN USUAL RANGE • Built from one value per day over the last 28 days • Appears after 7 days with a reading, with progress shown while it learns • Every range says which days it came from • Resting heart rate shown next to its own usual range • Last night's sleep and yesterday's activity next to theirs, and read together with HRV in the strain estimate CONTEXT IN ONE TAP • Log poor sleep, a workout, alcohol, feeling sick, late caffeine or travel • Check in with how you feel: calm, okay, tense or overwhelmed. It sits next to your reading and never changes it • Add a short note to any day • See logged days on your trends TRENDS • 7, 30 or 90 days of readings against your usual range, ending today • Days without a reading stay empty, never zero • How your readings compared with the period before, once there is enough to say it • How you felt across the period, and what shaped your days • Open any day to see every reading with its time, and add or change how you felt, its context and a note NO WATCH? USE THE CAMERA • A one-minute HRV reading with your fingertip over the iPhone's back camera and light • Shows RMSSD (a measure of HRV), heart rate and when it was measured • Compared only with your own saved camera readings, never with Apple Watch data • Saved on your iPhone only when you tap Save, and deletable at any time BREATHE • A guided one-minute break, plus two-minute box and 4-7-8 breathing and a five-minute long box • Gentle haptics on each phase, and a still version for Reduce Motion • Ends quietly with one question: how do you feel now? PRIVATE BY DESIGN • Reads heart rate variability, resting heart rate, sleep and active energy from Apple Health, read only • Your health data stays on your iPhone: no account, no cloud, never shared, never used for ads • The camera video is never recorded or stored; only a result you save is kept • Delete what the app stores at any time in Settings EVERYTHING INCLUDED, FREE • 7, 30 and 90-day trends • Home and lock-screen widget • Optional alerts when a new reading is below your usual range, with a cooldown and quiet hours • One-minute, box, 4-7-8 and five-minute breathing The app is free and shows ads, which never receive your health data. Two optional purchases remove the ads, and unlock nothing else, because nothing is locked: Remove Ads, a one-time purchase, or Remove Ads Yearly, a subscription with a 1-week free trial for new subscribers. Remove Ads Yearly renews automatically each year unless you cancel at least 24 hours before the end of the current period. Payment is charged to your Apple Account when you confirm the purchase, or when the free trial ends. Manage or cancel it in Settings > [your name] > Subscriptions. Terms of Use: https://fma-studio.org/apps/stress-meter/terms Privacy Policy: https://fma-studio.org/apps/stress-meter/privacy HRV from Apple Health needs an Apple Watch, which decides when it measures, usually while you are still; no app can start a watch measurement. Without a watch, take a camera reading. Stress Meter is not a medical device and does not diagnose, treat or prevent any condition. Talk to a doctor about health concerns.

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The developer, FREE MOBILE APPS STUDIO ONE MEMBER COMPANY LIMITED, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Location
    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
FREE MOBILE APPS STUDIO ONE MEMBER COMPANY LIMITED
Size
9.2 MB
Category
Health & Fitness
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
9+
  • 9+
  • Learn More
  • Contains
    Advertising
    Health or Wellness Topics
In-App Purchases
Yes
Copyright
© 2026 FMA Studio
  • Developer Website
  • Privacy Policy

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