Causal
Find your real health levers
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Most health apps show you numbers. Causal shows you cause and effect.
Causal connects your Apple Health biometrics with quick daily check-ins to reveal which of your habits actually move your sleep, heart-rate variability, resting heart rate, and recovery personalized to your body, not population averages.
How it works
• Connect Apple Health (read-only) for sleep, HRV, resting heart rate, and workouts
• Answer short, 5-second check-ins that pop up during your day: caffeine, stress, workouts, alcohol, and more
• Causal links the two together and surfaces a plain-English insight: "Caffeine after 2 PM delays your deep sleep by 35 minutes"
• See how each factor ranks as a lever for your own biometrics, and where you stand versus similar profiles
Why check-ins instead of manual logging?
Manual logging is biased. You remember the good days and forget the rest. Causal prompts you at lightweight moments during waking hours, so the picture reflects your real life with almost no effort.
Built private by default
• Read-only access to a limited set of Apple Health metrics. Causal never writes to your health data
• Product analytics are turned off
• Delete your account and all associated data anytime, right from the app
Causal is a personal wellness and self-knowledge tool. It does not diagnose, treat, or prevent any medical condition.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
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The developer, Berry Street Research Group LLC, 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 Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
- User Content
- Identifiers
- Other Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Berry Street Research Group LLC
- Size
- 14.9 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.
- iPhone
- Languages
- English
- Age Classification
13+
- 13+
- Infrequent
Alcohol, Tobacco, Drug Use or References
Contains
Health or Wellness Topics
- Copyright
- © 2026 Berry Street Research Group LLC