# Eve Day

> AI-powered period and pain tracker that learns your body and predicts pain. (iPhone/iPad app by Harrison Ju.)

- Source: https://appshunter.io/ios/app/eve-day/id6755921614 (this page in markdown: same URL + `.md`)
- Developer: [Harrison Ju](https://appshunter.io/developer/1856483755)
- Category: Health & Fitness
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 10 MB
- Languages: American English
- Released: 2025-12-02
- Data updated: 2026-10-02
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/eve-day/id6755921614/reviews.md

## What is Eve Day?

Eve is a period and pain tracker that actually learns YOUR body. Using on-device machine learning, Eve predicts when you'll experience pain - so you can prepare, not just react.

PREDICT YOUR PAIN
Eve analyzes your cycle phase, sleep, stress, and symptoms to predict pain levels for the coming days. The more you log, the smarter it gets.

BUILT FOR REAL CONDITIONS
Living with PCOS, endometriosis, or adenomyosis? Eve has specialized prediction models designed for your condition's unique patterns.

PRIVACY BY DESIGN
Your health data never leaves your device. No accounts. No cloud sync. No data selling. Everything stays on your iPhone.

TRACK WHAT MATTERS
  • Daily pain levels and symptom logging
  • Relief method tracking - see what actually works for you
  • Cycle and period tracking
  • Mood, sleep quality, and stress levels
  • HealthKit integration for deeper insights

LEARN YOUR PATTERNS
Eve doesn't just track - it learns. Discover correlations between your lifestyle and symptoms that you might never have noticed.

Eve was built because everyone deserves a period tracker that respects their privacy while providing genuinely useful insights.

## Key features

- On-device AI pain prediction
- Specialized models for PCOS/endometriosis
- Privacy-focused, no cloud sync
- Symptom and relief tracking
- Cycle and mood logging
- HealthKit integration


## Frequently asked questions about Eve Day

### Does Eve have ads?

No, Eve is completely ad-free, allowing for an uninterrupted user experience.

### How accurate is Eve's pain prediction?

Eve uses on-device machine learning that improves with more logged data. While specific accuracy percentages are not provided, the app is designed to learn your body's unique patterns for better predictions.

### What conditions does Eve have specialized prediction models for?

Eve offers specialized prediction models for PCOS, endometriosis, and adenomyosis, designed to account for their unique patterns.

### Is my health data safe with Eve?

Yes, Eve prioritizes privacy by design. Your health data never leaves your device, with no accounts, cloud sync, or data selling.

### What devices does Eve support?

Eve is available on iPhone and iPad devices.

### How often is Eve updated?

The latest version is 1.4.4, last updated on January 6, 2026. This indicates a relatively recent update, suggesting ongoing development and support.

### Can Eve integrate with Apple Health?

Yes, Eve features HealthKit integration, allowing for deeper insights by connecting with your Apple Health data.

### What is the age rating for Eve?

Eve has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 5 releases)

### 1.4.4 — 2026-01-06

Bug Fixes:
  - Fix quick log "Add more details" button not opening full log sheet

### 1.4.3 — 2026-01-04

Bug Fixes:
  - Fixed ovulation being predicted too early (day 9 instead of day 14)
  - Fixed fertile window overlapping with period
  - Fixed period predictions showing wrong duration
  - Fixed incorrect phase calculations in 10 files

### 1.4.2 — 2026-01-03

What's New in Eve 1.4.2

  Improved Predictions

  - More accurate ovulation estimates — Refined timing calculations for LH surge detection to better predict when
  ovulation will occur
  - Personalized fertile window — Fertile window recommendations now adapt to your unique cycle length instead of
  assuming a standard 28-day cycle
  - Better period tracking — Calendar now reflects your actual period length rather than a fixed assumption

  Bug Fixes

  - Fixed an issue where temperature data could be lost during analysis
  - Fixed cycle day calculations that could be off by one day in certain scenarios
  - Fixed sleep and stress pattern tracking to properly handle days without logged data
  - Fixed period end notifications to appear after your period ends, not on the last day
  - Improved stability and reduced potential crashes throughout the app

  Under the Hood

  - Enhanced date calculations across the app for greater consistency
  - Improved handling of irregular and longer cycles (including PCOS support)

### 1.4.0 — 2026-01-02

What's New in Eve 1.4.0

  Medication Optimization AI
  Smart timing recommendations help you take medications at optimal moments in your cycle for maximum effectiveness.

  Personalized Phase Insights
  New AI-powered content engine delivers tailored tips and insights specific to your current menstrual phase.

  Lifestyle Goals
  Set and track daily wellness goals with check-ins for sleep, exercise, stress management, and more. See how your
  habits connect with your cycle.

  Quick Log Cards
  Faster daily logging with new swipeable cards for Pain, Mood, Sleep, Exercise, and Flow — log your day in seconds.

  Predictive Warnings
  Get ahead of difficult days with anomaly detection that alerts you to unusual patterns before symptoms hit.

### 1.3.1 — 2025-12-20

New: Digestive Health Tracking
  
  Many people experience digestive changes throughout their cycle. Now you can track and understand these patterns.

  • Log stool consistency, bowel movements, and discomfort levels
  • Track relief methods like coffee, fiber, walking, and more
  • Smart prompts during phases when digestive changes are common
  • Personalized relief tips based on your symptoms

  Bug Fixes
  • Fixed a crash that could occur when snoozing reminders

## Apps similar to Eve Day

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Period Tracker, PCOS & PMOS](https://appshunter.io/ios/app/period-tracker-pcos-and-pmos/id6811044942) | — | Free | Health & Fitness |
| [Blood Pressure Tracker ۬](https://appshunter.io/ios/app/blood-pressure-tracker/id6746935341) | — | Free | Health & Fitness |
| [Aurelle Period Tracker](https://appshunter.io/ios/app/aurelle-period-tracker/id6760797075) | — | Free | Health & Fitness |
| [Moirai EndoCare](https://appshunter.io/ios/app/moirai-endocare/id6473711587) | — | Free | Health & Fitness |
| [Meal Tracker: Bites](https://appshunter.io/ios/app/meal-tracker-bites/id6755179382) | 4.7 (7) | Free | Health & Fitness |
| [Moon Ritual: Daily Intention](https://appshunter.io/ios/app/moon-ritual-daily-intention/id6783739738) | 4.9 (15) | Free | Health & Fitness |

## More apps by Harrison Ju

- [Tylt: Sports Betting Insights](https://appshunter.io/ios/app/tylt-sports-betting-insights/id6793003685)

All apps by Harrison Ju: https://appshunter.io/developer/1856483755

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-02.*