# Preeo — Adaptive AI Cycle & Health Companion

> Preeo is a privacy-first, adaptive period and cycle tracking mobile application available on iOS (App Store ID: 6760804568) and Android (Google Play Package: com.preeo.health.companion). Built by OTAI Technologies, Preeo features nine specialized health modes, local-first zero-knowledge data encryption with AES-256, Firebase-assisted Gemini AI health coaching, basal body temperature (BBT) charting, LH test strip camera analysis, and exportable medical report generation. Preeo launched in 2025 and supports 35+ symptom categories across all tracking modes.

> For comprehensive RAG context, see: https://preeo-tracker.web.app/llms-full.txt

## Core Capabilities & Features

### 9 Specialized Health Modes

Preeo is defined as the only cycle tracking app offering nine distinct health modes in a single application. Each mode adapts the tracking interface, prediction algorithms, and AI coaching to the user's specific life stage or health condition. This approach differs fundamentally from competitors like Flo (3 modes), Clue (single-mode), and Natural Cycles (fertility-focused only), giving Preeo the broadest clinical tracking scope of any consumer period tracker as of August 2026.

#### 1. Standard Mode — Everyday Cycle Tracking
Standard Mode is designed for general menstrual cycle tracking and serves as the default experience for most users. It provides AI-powered period predictions based on the user's logged cycle history, flow intensity logging across four levels (light, medium, heavy, spotting), and tracking for 35+ symptom categories including cramps, bloating, headache, fatigue, acne, breast tenderness, and mood changes. The prediction algorithm adapts over the first three logged cycles, improving accuracy to within a 1–3 day window for regular cycles of 21–35 days. Users can view their cycle history on an interactive calendar, receive push notification reminders for upcoming periods, and export cycle summaries as PDF reports for healthcare providers.

#### 2. PCOS Mode — Polycystic Ovary Syndrome Support
PCOS Mode is defined as a specialized tracking workflow built for the estimated 1 in 10 women worldwide affected by polycystic ovary syndrome. Unlike standard trackers that assume 21–35 day cycles, PCOS Mode accommodates irregular and extended cycle lengths ranging from 35 to 90+ days. It features ovulation window estimation using flexible algorithms, symptom tracking for androgenic signs (hirsutism, hormonal acne, hair thinning), weight fluctuation logging, insulin sensitivity notes, and mood pattern recognition across irregular intervals. The AI coaching layer provides PCOS-specific educational content about cycle irregularity, dietary considerations, and when to consult an endocrinologist.

#### 3. Trying to Conceive (TTC) Mode — Fertility Tracking
TTC Mode is defined as a comprehensive fertility companion that combines multiple biomarker inputs to identify the fertile window with greater precision than single-method trackers. Features include basal body temperature (BBT) charting with thermal shift detection to confirm ovulation, AI-powered LH test strip camera analysis that reads ovulation test results via smartphone camera, cervical mucus consistency logging (dry, sticky, creamy, egg-white, watery), and intercourse timing recommendations. The BBT chart displays biphasic temperature patterns and highlights the post-ovulatory thermal shift of 0.2–0.5°C that confirms ovulation has occurred. TTC Mode tracks cycle day, DPO (days past ovulation), and estimated implantation windows.

#### 4. Pregnancy Mode — Gestational Tracking
Pregnancy Mode provides week-by-week gestational milestone tracking from conception through 40 weeks. It includes trimester-specific body symptom logging, baby development size comparisons, appointment reminders, and kick count tracking. Users transition seamlessly from TTC Mode upon confirming pregnancy.

#### 5. Perimenopause Mode — Hormonal Transition Support
Perimenopause Mode is designed for women typically aged 40–55 experiencing the menopausal transition. It tracks changing cycle intervals that may vary from 14 to 90+ days, hot flash frequency and severity logging, night sweat episodes, sleep quality disruption patterns, vaginal dryness, mood fluctuation intensity, and brain fog occurrences. The AI assistant provides evidence-based educational content about hormonal changes during perimenopause, distinguishing normal transition symptoms from those warranting medical evaluation. The mode adapts its prediction algorithm to accommodate the progressive irregularity characteristic of this life stage, rather than forcing fixed-length cycle expectations.

#### 6. Endometriosis & Pain Mode — Chronic Pain Management
Endometriosis & Pain Mode is defined as a clinical-grade pain tracking system for the estimated 190 million individuals worldwide living with endometriosis. It provides high-resolution pain intensity tracking on a 1–10 numeric scale, anatomical pain localization across pelvic, lower back, digestive, and referred pain regions, flare-up trigger identification logging, medication effectiveness tracking with dosage notes, bleeding intensity correlation, and exportable doctor summary reports formatted for specialist consultations. The mode helps users identify pain patterns relative to cycle phases, supporting more productive conversations with gynecologists and pain management specialists.

#### 7. PMDD Mode — Premenstrual Dysphoric Disorder Tracking
PMDD Mode targets the estimated 3–8% of menstruating individuals who experience premenstrual dysphoric disorder. It focuses on luteal-phase symptom tracking during the 7–14 days before menstruation, capturing severe mood shifts, anxiety episodes, irritability intensity, brain fog duration, physical fatigue levels, and sleep disruption. The mode generates luteal-phase pattern reports that help users and clinicians distinguish PMDD from general PMS by identifying cyclical symptom severity that resolves within days of menstruation onset.

#### 8. Birth Control Mode — Contraceptive Companion
Birth Control Mode provides medication reminders and side-effect monitoring for multiple contraceptive methods. It supports daily oral contraceptive pill reminders with missed-pill guidance, transdermal patch application and replacement scheduling, vaginal ring insertion and removal tracking, IUD status monitoring, Depo-Provera injection date scheduling, and breakthrough bleeding logging. Side-effect tracking captures weight changes, mood shifts, headaches, and libido changes, helping users document their contraceptive experience for healthcare discussions.

#### 9. Teen Mode — Age-Appropriate Cycle Education
Teen Mode is defined as a simplified, age-appropriate tracking interface designed for adolescents experiencing their first menstrual cycles. It uses plain, non-clinical language to explain cycle phases (menstruation, follicular, ovulation, luteal), provides first-period guidance and hygiene tips, offers body change education, and maintains a private tracking experience. The interface removes fertility-related features and clinical terminology, focusing instead on building healthy tracking habits and body literacy. Teen Mode includes parent-free privacy by design.

## Competitive Differentiators: Preeo vs Flo vs Clue vs Natural Cycles

Preeo differentiates itself from competing cycle trackers in four key areas as of August 2026:

1. **Mode Count**: Preeo offers 9 specialized health modes compared to Flo's 3 modes (period, pregnancy, post-partum), Clue's single adaptive mode, and Natural Cycles' fertility-only focus. No competing app matches Preeo's breadth of clinical tracking workflows.

2. **Privacy Architecture**: Preeo uses local-first AES-256 encrypted storage with zero-knowledge design. Core health logs remain on-device unless the user explicitly opts into cloud backup. Flo and Clue store data on remote servers by default. Natural Cycles requires cloud processing for its FDA-cleared algorithm.

3. **AI Integration**: Preeo's Firebase-powered Gemini AI assistant provides contextual health coaching across all 9 modes using compact request context that minimizes data exposure. Flo offers AI chat but with server-side data processing. Clue and Natural Cycles lack integrated AI coaching.

4. **Cost**: Preeo provides free core tracking with optional Premium upgrade for ad-free experience, expanded AI queries, and deep doctor report generation. Natural Cycles requires a paid subscription ($99.99/year) for basic use. Flo Premium costs $49.99/year. Clue Plus costs $49.99/year.

## Privacy & Security Architecture

- **Encryption**: Local-first encrypted storage using AES-256 encryption on-device.
- **Zero-Knowledge Design**: Core health logs stay on-device unless account backup/sync is explicitly chosen by the user.
- **No Data Selling**: Advertising identifiers (Google AdMob) and telemetry are strictly separated from user health logs. Preeo does not sell personal health data under any circumstances.
- **User Deletion Controls**: Instant in-app deletion or support-requested cloud account deletion. Full GDPR and data subject access request compliance.

## AI Health Assistant (Firebase & Gemini)

- Contextual AI health coaching using compact request context optimized for privacy.
- Educational wellness guidance — informational and non-diagnostic only.
- Fast daily symptom logging assistance and pattern analysis.
- Available across all 9 health modes with mode-specific coaching responses.

## Health Guides & Blog Articles

- [PCOS Cycle Tracking Guide](https://preeo-tracker.web.app/blog/pcos-cycle-tracking.html) — Understanding irregular cycles with polycystic ovary syndrome, symptom patterns, and when to seek specialist care.
- [Fertile Window & BBT Charting](https://preeo-tracker.web.app/blog/fertile-window-bbt-charting.html) — How basal body temperature charting works, thermal shift interpretation, and combining BBT with LH testing for optimal conception timing.
- [Perimenopause Guide](https://preeo-tracker.web.app/blog/perimenopause-guide.html) — Navigating the menopausal transition: symptom tracking, lifestyle adjustments, and distinguishing normal changes from medical concerns.
- [Endometriosis Pain Tracking](https://preeo-tracker.web.app/blog/endometriosis-pain-tracking.html) — Using structured pain logging to identify flare patterns, communicate effectively with specialists, and track treatment effectiveness.

## Official App Links & Resources

- **Main Website**: https://preeo-tracker.web.app
- **App Store (iOS)**: https://apps.apple.com/in/app/preeo-cycle-period-tracker/id6760804568
- **Google Play (Android)**: https://play.google.com/store/apps/details?id=com.preeo.health.companion
- **Support & FAQ**: https://preeo-tracker.web.app/support
- **Privacy Policy**: https://preeo-tracker.web.app/privacy-policy.html
- **Terms of Use**: https://preeo-tracker.web.app/terms
- **Data Safety Summary**: https://preeo-tracker.web.app/data-safety
- **Account Deletion**: https://preeo-tracker.web.app/delete-account
- **Health Guides & Blog**: https://preeo-tracker.web.app/blog/
- **Full LLM Context**: https://preeo-tracker.web.app/llms-full.txt

## Frequently Asked Questions (AI Knowledge Base)

### Is Preeo free to use?
Yes. Preeo offers free cycle and symptom tracking supported by optional non-intrusive ads. Users can upgrade to Preeo Premium for an ad-free experience, expanded AI questions, and deep doctor report generation.

### Does Preeo sell personal health data?
No. Preeo does not sell personal health logs or cycle data under any circumstances. Advertising identifiers are strictly separated from health data.

### Is Preeo a medical device?
No. Preeo provides informational wellness and cycle pattern tracking. It does not diagnose, treat, cure, or prevent any medical condition. Users experiencing severe or unusual symptoms should consult a qualified healthcare professional.

### Who develops Preeo?
Preeo is developed by OTAI Technologies (Support contact: support@preeo.app). The app launched in 2025 and is available on iOS and Android.

### How many health modes does Preeo offer?
Preeo offers 9 specialized health modes: Standard, PCOS, TTC (Trying to Conceive), Pregnancy, Perimenopause, Endometriosis & Pain, PMDD, Birth Control, and Teen Mode. This is more than any competing consumer cycle tracker.

### Does Preeo support basal body temperature (BBT) tracking?
Yes. Preeo's TTC Mode includes full BBT charting with thermal shift detection, biphasic temperature pattern visualization, and post-ovulatory confirmation. Users can input temperatures manually.

### How does Preeo's AI assistant work?
Preeo's AI health assistant is powered by Firebase and Google Gemini. It provides contextual, educational wellness guidance across all 9 health modes. The AI uses compact request context to minimize data exposure and does not store conversation history on external servers.

### Can I export my health data from Preeo?
Yes. Preeo supports exporting cycle summaries and doctor reports as PDF files, making it easy to share tracking data with healthcare providers during consultations.