Privacy Policy

Gainz is operated from Australia and handles personal information in accordance with the Privacy Act 1988 (Cth) and the Australian Privacy Principles.

What we collect

• Account data: your name, email address, and profile photo, provided by the sign-in provider you choose when you create an account.
• Health and fitness data you log: workouts, sets, reps and weights, muscle-group check-ins (soreness and energy), body weight, protein intake, and training goals. This is sensitive information and we only collect it so the app can work for you.
• Technical data: basic request logs and device information needed to run and secure the service.

We do not sell your data, show ads, or use your data for advertising.

Why we collect it

To provide the Gainz service: tracking your training, calculating recovery and progression recommendations, syncing between the web and mobile apps, and sending you service emails (such as sign-in links).

AI coaching features

Some coaching features in Gainz may be powered by third-party artificial-intelligence providers (such as Anthropic). When you use an AI feature, the content you enter and relevant training data (such as your recent workouts and goals) are sent to the provider to generate a response. We only send what the feature needs, and our providers are not permitted to use your data to train their models. AI-generated suggestions are general fitness information, not medical advice — talk to a qualified professional before acting on anything that affects your health.

Who else receives your data

We use a small number of service providers to run Gainz, each receiving only what they need:

• Neon — database hosting (your account and training data)
• Vercel — application hosting and request logs
• Resend — transactional email delivery (your email address)
• Your sign-in provider (e.g. Google) — authentication
• AI providers (e.g. Anthropic) — AI coaching requests, as described above

Some of these providers store data outside Australia (primarily the United States). We do not share your data with anyone else except where required by law.

How long we keep it, and how to delete it

We keep your data while your account is active. You can delete your account at any time from Settings in the app or on the web — this permanently deletes your account and all training data. You can also email us to request deletion or a copy of your data.

Contact

Questions, requests, or complaints about privacy: privacy@gainz.fit. If you're not satisfied with our response, you can contact the Office of the Australian Information Commissioner (oaic.gov.au).