Short answer

Gaia is 28's in-app AI wellness companion. You can ask about your cycle, energy, cravings, workouts and food by voice or text. Gaia gives general wellness information matched to your phase. It is not a doctor, not a therapist, and not medical advice.

What Gaia helps with

• Questions about where you are in your cycle and what that often feels like
• Workout ideas that fit your current phase
• Food and craving questions tied to your phase and goals
• Everyday wellness check-ins inside the same app as your tracker

What Gaia is not

• Not medical advice, diagnosis or treatment
• Not birth control guidance
• Not a substitute for a clinician, especially for pain, bleeding changes, fertility decisions or mental health crises

If something feels wrong with your health, talk to a qualified clinician.

Privacy and how Gaia runs

There are no ads in 28, and we don't sell your data. Gaia runs on models from OpenAI, with Anthropic as a backup, and Google for recipe and meal imagery. 28 uses OpenAI and Anthropic through their business APIs, which do not use customer data to train their models. Google receives meal and recipe descriptions and images only, and does not receive your identity or cycle data. If you talk to Gaia by voice, the audio goes to OpenAI or xAI in real time, and 28 does not record or store it. Full policy: privacy policy.

28 tools outside the app

For ChatGPT and Claude integrations, 28 also runs a read-only MCP server at app.28.co/mcp with phase estimate, phase meal ideas, phase workout ideas and a symptom explainer. Docs: app.28.co/ai.

Related pages

• What is 28: what is 28
• Cycle syncing: cycle syncing
• Privacy FAQ: privacy FAQ
• App Store: 28: Period & Cycle Tracker
• Markdown of this page: gaia.md