Privacy
Privacy policy
Last updated: 6 November 2026
This policy explains how Tempest.energy collects and uses your personal information. We've tried to keep it plain and short.
Who we are
Tempest.energy is a trading name of Deep Blue AI Ltd, a company registered in England and Wales (company number 15952440), registered office 167–169 Great Portland Street, 5th Floor, London W1W 5PF. We are the "controller" of your personal information, which means we decide how it is used and are responsible for protecting it.
Contact us about privacy at info@tempest.energy.
What Tempest is
Tempest is a wellness coaching service for adults aged 18 and over, currently in development and testing with a small group. It helps you understand your own smartwatch data and build better habits. It does not diagnose, treat or monitor medical conditions. This policy covers our website, founding group sign-ups and the service as we test it, and we'll update it as Tempest develops.
What we collect
Founding group sign-ups: if you email us to register interest, your first name, email, watch brand and what you'd like to improve. We use this to contact you about joining, and only send updates if you tell us you'd like them. We delete sign-ups that don't become members after 12 months.
Account information: your name, email address, and the preferences you set (such as how often you'd like check-ins, tone, and quiet hours).
Smartwatch data: if you connect a device, daily summaries such as sleep, heart rate, heart rate variability, stress, steps, activity and workouts. If you choose to, menstrual cycle data (when available). We only collect data from services you connect, and only the types you agree to.
Apple Health exports: if you upload an Apple Health export, it is processed in your browser and only daily summaries are sent to us. The full export file never leaves your device.
What you tell us: check-in answers, messages, goals and other things you share. Anything Tempest remembers about you is shown on your "What I remember about you" page, where you can edit or delete it.
Coach notes: on coached plans, notes your coach makes about your progress.
Technical information: basic logs needed to run and secure the service (for example, the time of a request and error information). These logs never contain your watch data or messages.
Health data
Smartwatch data, cycle data and some things you tell us can be "special category" health data under UK data protection law. We only process it with your explicit consent, which you give when you connect a device or choose to share it. You can withdraw consent at any time by disconnecting a device or deleting the data in the app; this doesn't affect anything we did before you withdrew it.
How we use it
- To provide the service: showing your trends against your own baseline, spotting patterns, suggesting experiments and following them up.
- To write your summaries and check-ins, using AI (see below).
- On coached plans, so your coach can review and personalise what you receive.
- To keep you safe: if you mention warning signs such as chest pain, we stop coaching and point you to the right help.
- To run, secure and improve the service, and to contact you about your account.
We will only send you marketing emails if you have opted in, and you can unsubscribe at any time.
We do not sell your data, use it for advertising, or share it with data brokers.
Our legal bases
- Contract: to provide the service you've signed up for.
- Explicit consent: for health data, and for connecting devices.
- Consent: for marketing emails.
- Legitimate interests: to keep the service secure and working properly.
- Legal obligation: where the law requires us to keep or share information.
How we use AI
Tempest uses an AI model (Claude, provided by Anthropic) to write your summaries, check-ins and replies. The calculations behind them, such as your baseline, trends and patterns, are done by fixed rules in our own system; the AI turns the results into plain English. We send only the information needed for each task: no surname, email, date of birth or contact details. We use your first name so messages can address you.
Under Anthropic's commercial terms, your data is not used to train AI models, and it is deleted from Anthropic's systems within 30 days (longer only where needed to investigate misuse or where the law requires).
On coached plans, a human coach reviews AI-drafted messages before they are sent in the coach's name, and these messages are labelled as drafted with AI. AI-generated content does not make decisions about you that have legal or similarly significant effects.
Who we share it with
We use trusted suppliers who process data on our behalf and under our instructions:
| Supplier | What for | Where |
|---|---|---|
| Google Cloud | Hosting the app | London, UK |
| Supabase | Database | London, UK |
| Anthropic | AI writing of summaries and messages | United States |
| Microsoft 365 | Our email, including founding group sign-ups | United Kingdom |
When you connect a device, we receive your data from that device's provider (for example, Garmin). Their own privacy policy covers how they handle your data. Disconnecting in Tempest stops us receiving new data.
Your coach, on coached plans, can see the information needed to coach you. We may also share information if the law requires it, or to protect someone's life in an emergency.
International transfers
Most of your data is stored in the UK. Where a supplier processes it outside the UK (such as Anthropic in the United States), we rely on legal safeguards approved under UK law, such as the UK International Data Transfer Addendum to the EU Standard Contractual Clauses.
How long we keep it
We keep your information while your account is active. When you close your account, we delete your login and wellness data straight away, and it leaves our backups within a further 7 days. We keep a record of the consents you gave, as the law expects, and may keep other limited records longer where the law requires it (for example, payment records).
Your rights
You have the right to:
- access your data and get a copy;
- correct it;
- delete it;
- restrict or object to how we use it;
- move it to another service (data portability);
- withdraw consent at any time.
Many of these you can do yourself in the app. Otherwise, email info@tempest.energy. We'll respond within one month.
If you're unhappy with how we've handled your data, please tell us first. You can also complain to the Information Commissioner's Office (ICO): ico.org.uk or 0303 123 1113.
Cookies
The public website uses no cookies. The members app uses only essential cookies needed to keep you signed in. We don't use analytics or advertising cookies.
Children
Tempest is for adults aged 18 and over. We don't knowingly collect data from anyone under 18.
Security
Your data is encrypted in transit and at rest, access is restricted to the people who need it, and access to records is logged.
Changes
If we make significant changes to this policy, we'll tell you in the app or by email before they take effect.