Holter Diary
Symptoms, heart rate & PDF
$3.99 · Designed for iPad. Not verified for macOS.
Quick symptom recording on Apple Watch, optional Apple Health heart-rate imports, and adaptive layouts for iPhone Duo. Keep a clear diary and share a PDF when you choose.
Holter Diary is a simple, private diary companion for people wearing a Holter monitor. Record what you feel when it happens, keep events in chronological order, and create a clear PDF diary to review with your doctor or clinic.
RECORD THE MOMENT
Save the time first when a symptom happens, then add details when you are ready. Record symptoms, heart-rate readings, activity, possible triggers, severity, duration, notes, and whether you pressed the Holter device button.
KEEP A CLEAR TIMELINE
See symptom events, heart-rate-only readings, and device issues together in time order. Add late entries or correct details while preserving the time the event occurred.
CREATE A DOCTOR-READY PDF
After monitoring ends, generate a structured PDF diary with the session summary and recorded entries. Review it before choosing where to save or share it.
APPLE WATCH AND APPLE HEALTH
Record common symptoms on a paired Apple Watch, even while disconnected. Open Holter Diary on your iPhone to finish syncing entries with their original timestamps. With your permission, preview recent heart-rate readings from Apple Health and save selected readings to your active diary. The watch can display and save a recent available heart-rate sample; the app does not start continuous heart-rate monitoring or write to Apple Health.
ADAPTIVE LAYOUTS FOR IPHONE DUO
Responsive layouts adapt to the available screen size on iPhone Duo. Wide views show a two-column dashboard and symptom grid; narrow views and larger text use a single column.
PRIVATE BY DESIGN
• No account or sign-in
• Diary data stays in private storage on your device
• No analytics, ads, tracking, or remote crash reporting
• No publisher backend or cloud collection; optional paired-watch sync uses Apple connectivity
• Optional local reminder for the expected end of a session
MADE FOR CLARITY
Large controls, adjustable text size, light and dark appearance, landscape support, and clear safety guidance help make the app easier to use during monitoring.
IMPORTANT MEDICAL INFORMATION
Holter Diary is a patient diary only. It is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. It does not read or interpret ECG data, connect to a Holter monitor, monitor you, or send entries to a healthcare provider. Always follow your clinic’s instructions. Consult a healthcare professional for medical advice, diagnosis, or treatment, and seek urgent medical help for symptoms that feel dangerous.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Adaptive layouts for iPhone Duo, with a two-column dashboard and symptom grid when space allows.
• Record common symptoms on Apple Watch. Entries save offline and sync with their original timestamps when you open the phone app.
• Preview and save selected recent heart-rate readings from Apple Health.
• Improved watch sync with duplicate prevention and review of entries that need attention.
• Clearer navigation, PDF report controls, and control contrast in light and dark modes.
• Layouts adapt to larger text and shorter screens.
Apple Watch and health access are optional. Watch controls currently use English; symptom labels follow your selected phone language.
The developer, I3 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
- I3 LLC
- Size
- 46 MB
- Category
- Medical
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 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 and 13 more
- English, Arabic, Bengali, French, German, Hindi, Indonesian, Japanese, Malay, Portuguese, Russian, Simplified Chinese, Spanish, Tamil
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Alcohol, Tobacco, Drug Use or References
Contains
Health or Wellness Topics
- Copyright
- © 2026 I3 LLC
