Undercurrent Health
Daily wellness insights
Free · Designed for iPhone. Not verified for macOS.
See your recent health pattern, compare it with your own history, and bring your latest trend and daily focus to Apple Watch.
Undercurrent helps you notice changes in your Apple Health data over time.
YOUR RECENT PATTERN
Compare three recent consecutive observation days with at least seven earlier days in your recent history. Resting heart rate, HRV and sleep can contribute. View recent and usual averages, a 14-day chart when available, and the evidence behind the summary. Missing observations are not invented.
TODAY'S FOCUS
A short next step helps put the pattern in context. Changes do not identify a medical cause. When history is incomplete, the app shows what is still needed.
EXPLORE YOUR DAY
Browse available recovery, sleep, daily rhythm and health trends. Data availability depends on your Apple Health records and devices.
APPLE WATCH
The companion Watch app displays the personal trend and focus calculated on iPhone. Open Today on iPhone to refresh, then use Sync iPhone on Watch. A watch-face complication provides a shortcut to your latest pattern. Old or missing snapshots show an update prompt.
PRIVACY
No account required. Processing takes place locally. Your trend summary syncs between your paired iPhone and Apple Watch; no developer-operated cloud service or advertising tracking is used.
Undercurrent provides general wellness information, not medical advice, diagnosis or treatment.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
A new personal-trend home screen compares your recent observations with your own history and shows the evidence. Adds a companion Apple Watch app and complication, with iPhone sync, clear learning states and stale-data handling.
The developer, Hashing 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 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
- Hashing LLC
- Size
- 2.7 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. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
- Copyright
- © 2026 Hashing LLC