Features Your Cycle How It Works Privacy Reviews Download on App Store
Now available on iOS

Understand
your cycle.
Unlock
your life.

AI-powered cycle intelligence that's science-backed and privacy-first. Get personalized nutrition, fitness, and mindfulness recommendations for every phase — all on your device.

Free to download 100% on-device AI Science-backed
9:41
codeXX
Your cycle companion
Ovulation
Day 14 · 3 days
Peak Energy
Your most energetic phase. Perfect for high-intensity workouts and social activities.
Log Period
Symptoms
AI Chat
Pre-Workout Nutrition
Optimize energy for peak performance
Home
Calendar
Track
Discover
Learn
4
Cycle phases tracked
100%
On-device AI processing
6+
Pro features
0
Health data shared to cloud
Features

Everything your
cycle deserves.

A complete cycle intelligence platform — from daily tracking to AI-powered insights, all while keeping your most intimate health data completely private.

Smart Cycle Tracking

Log your period, flow intensity, symptoms, and mood with a tap. Intelligent predictions learn your unique patterns over time.

PRO

AI Health Chat

Ask your cycle anything, anytime. Your personal AI assistant understands your patterns and delivers science-backed answers — unlimited.

Phase-Based Insights

Get personalized nutrition, workout, and mindfulness recommendations tailored exactly to your current cycle phase. Every day, different.

Privacy-First AI

Federated machine learning that improves from community patterns — while your personal health data never once leaves your device.

PRO

Symptom Trends

Discover patterns in your symptoms across weeks and months with beautiful charts and actionable, science-backed insights.

PRO

Doctor Export PDF

Generate a comprehensive health report ready for medical appointments. Share months of cycle data and symptom trends with your healthcare provider.

Your Cycle

Four phases.
One you.

Your cycle is more than a period — it's a dynamic hormonal system with four distinct phases, each with its own energy, mood, and opportunities for your body.

Days 1–5 · Menstrual

Rest & Restore

The shedding phase. Low energy is natural and intentional — prioritize gentle movement, iron-rich foods, and deep rest.

Days 6–13 · Follicular

Energy Rises

Estrogen climbs. Creativity and motivation surge — the perfect time for new projects, social activities, and harder workouts.

~Day 14 · Ovulation

Peak Confidence

Peak estrogen and testosterone. You're at your most energetic, magnetic, and communicative. Lean into it fully.

Days 15–28 · Luteal

Prepare & Wind Down

Progesterone rises. Focus on nourishing foods, mindfulness, and lighter exercise as your body prepares for the next cycle.

How It Works

Simple to start.
Powerful over time.

Get going in minutes. The longer you use codeXX.health, the smarter it becomes — learning your unique patterns entirely on your device.

1

Track Your Cycle

Log your period, flow, symptoms, and mood in seconds. Every data point makes your predictions and insights more accurate over time.

2

AI Learns Your Patterns

On-device AI analyzes your unique cycle. Using federated learning, it gets smarter with community insights while your personal data stays private — always.

3

Live Your Best Cycle

Receive daily personalized recommendations for nutrition, exercise, and mindfulness. Ask the AI anything. Export reports for your doctor. Know yourself.

App Preview

Beautifully designed
for every phase.

codeXX
Your cycle companion
Menstrual
Day 2
Rest & Restore
Prioritize gentle movement and iron-rich foods today.
Log Period
AI Chat
Iron-Rich Meal Plan
Tailored for menstrual phase
Home
Calendar
Track
Discover
Learn

Home Dashboard

AI Chat
Cycle Intelligence

You're in ovulation — your peak energy day! I'd recommend a high-intensity workout today. 🌟

What should I eat before my workout?

Complex carbs + lean protein 2h before. Oats with banana and almond butter is ideal. ✨

Amazing, thank you! What about post-workout?

Ask your cycle anything...

AI Health Chat

Calendar
March 2026
MenstrualDays 1–5
FollicularDays 6–13
Ovulation~Day 14
LutealDays 15–28
Home
Calendar
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Cycle Calendar

Reviews

Loved by women who
know their cycle.

"Finally a cycle app that feels as intelligent as I am. The AI chat gives me actual science-backed answers about my hormones — not generic wellness fluff. This is what I've been looking for."

S
Sarah M.
Nutritionist · ⭐ App Store

"The privacy-first approach sold me immediately. I was skeptical about sharing health data with any app — but knowing the AI runs completely on my device with zero cloud sharing? That's a genuine game changer."

J
Julia K.
Software Engineer · ⭐ App Store

"The doctor export PDF is next-level. I walked into my appointment with 6 months of cycle data, symptom trends, and phase analysis all formatted beautifully. My doctor was genuinely impressed."

A
Amara T.
Health Coach · ⭐ App Store
Privacy First

Your data stays
on your device.

We built codeXX.health on a radical premise: the most intimate health data in the world should never leave your iPhone.

On-Device Processing
All AI analysis happens locally on your iPhone. No personal health data is ever transmitted to any server.
Federated Learning
Our AI gets smarter from community patterns using differential privacy — learning without ever accessing your individual data.
Encrypted Storage
All cycle data is encrypted at rest using iOS's secure enclave. Only you can ever access your health information.
codeXX Pro

Unlock your full
cycle intelligence.

Start free. Upgrade to Pro for unlimited AI chat, symptom trends, doctor export, and personalized ML insights.

codeXX Pro
Unlock everything
PRO
€5.99
per month
Unlimited AI Health Chat
Symptom Trends & Analytics
Doctor Export PDF
Full Content Library (Fitness, Nutrition, Mindfulness)
Personalized On-Device ML Insights
Smart Phase-Aware Reminders
Start 2 Months Free

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