Privacy Policy

Phase (“Phase,” “we,” “us”) is a strength-training app that adapts your program to your menstrual cycle. We built Phase to be private by design. This policy explains what data the app handles and how.

The short version

• Your cycle, training, and check-in data stay on your device and in your own private iCloud(Apple's CloudKit private database).
• Phase does not store your data on its servers.The only exception is the optional Coach (below): while you use it, your messages and training context pass through Phase's server to an AI model provider to write replies, and are not stored by Phase.
• No tracking, no analytics, no ads. We do not sell your data or use it for advertising.

What data Phase processes

All of the following is created by you and stored only on your device and in your private iCloud account:

• Cycle data — period start dates and lengths, cycle settings.
• Training data — workouts, sets, weights, reps, RPE, personal records.
• Daily check-ins — energy, soreness, and sleep ratings.
• Body progress — progress photos and body measurements, if you add them.
• Preferences — units, program choices, notification settings.

Phase does not require an account, email, or sign-in.

The Coach (optional, AI)

The Coach is off until you turn it on. When it's on, each message you send includes, so the coach can answer:

• your message;
• your goal, plan, recent workouts and personal records, and recent check-ins;
• if you track your cycle and allow it: today's cycle phase, day of cycle and check-in symptoms.

It neverincludes your name, email, photos, body measurements, period dates or Apple Health data. Voice input is turned into text on your iPhone; audio is not sent. If you talk to the coach through Siri, Apple handles that request under Siri's own terms before the text reaches Phase.

This information goes to Phase's server, which forwards it to OpenRouter, a service that routes it to an AI model provider (the provider may change as we improve the coach). We only use providers that don't train on or keep your messages, where the provider offers that. Phase's server does not store your messages; it keeps a count of usage (not content) per random device ID to limit abuse. Your conversation history is stored on your device and in your private iCloud. You can clear it or turn the Coach off in Settings at any time.

The Coach gives training suggestions only. It is not medical advice.

Apple Health (HealthKit)

If you choose to connect Apple Health, Phase can:

• Read menstrual/cycle data to estimate your phase and plan training, and
• Write periods you log in Phase back to Health — only if you turn that on.

Health data accessed through HealthKit is used solely to provide app features on your device. It is never used for advertising or marketing, and it is never shared with third parties. You can revoke access anytime in Settings → Health → Data Access & Devices.

Purchases

Phase offers an optional subscription (Phase Pro). Purchases are processed by Apple; we do not receive or store your payment information.

Notifications

Phase uses local notifications only (e.g. power-window and period reminders). These are scheduled on your device.

iCloud sync

If iCloud is enabled, your data syncs across your devices through your private CloudKit database, secured by your Apple Account. Apple processes this data under Apple's privacy terms; Phase has no access to it.

Data retention and deletion

You are in control of your data:

• Delete in-app: Settings → Delete all data removes your cycle history, workouts, and PRs from the device and your private iCloud.
• Delete the app: removing Phase deletes its on-device data; you can remove its iCloud data from your Apple Account storage settings.

Children

Phase is not directed to children under 13 and does not knowingly collect data from them.

Medical disclaimer

Phase provides general training education based on published research about menstrual cycles and exercise. It is not medical advice, and ovulation estimates are for training planning only — never for family planning or contraception. Consult a healthcare provider for medical concerns.

Changes to this policy

We may update this policy; material changes will be reflected by a new effective date here.

Contact

Privacy questions? Email privacy@cyclesyncedlifting.com. For anything else, see our Support page.