Privacy policy
Neutrino ("Neutrino", "we", "us") makes the Neutrino app and website, a calorie, fitness and health coach. This policy explains what we collect, why, who we share it with, and the choices you have. In short: your health data is yours, we never sell it, we never use it for ads, and our team can only look at it if you say yes.
Questions or requests: [email protected].
What we collect
- Account details: your name, email address and, if you sign in with Google, your Google account ID and profile picture.
- Profile: birth date, sex, height, goals, time zone and language, used to work out your targets.
- Health and fitness data you add or connect: meals and food photos, water, weight and body measurements, workouts, steps, sleep, heart rate, blood glucose, blood pressure, medicines and doses, the conditions you choose to track and their logs, progress photos, and your messages to the AI coach.
- Data from Health Connect and Bluetooth meters, only for the types you allow.
- Purchases: your plan and subscription status from Google Play. We never see your card details.
- Device and usage: device model, app version, sign-in sessions, crash reports and how you use features. Crash reports are scrubbed of personal data.
- Support and community: tickets, emails and chats you send us, and anything you post on our community help forum (posts there are public).
- Meter compatibility: the maker, model and firmware of a connected meter and whether a sync worked, never your readings.
How we use it
- To run Neutrino: logging, charts, goals, reminders, syncing between your phone and the web, and your plan's features.
- For AI features: when you scan a meal or ask the coach, we send only what that request needs (for example the photo, or a short summary of the chosen day) to an AI provider and show you the answer. We choose providers and settings that do not use your requests to train their models where that option exists.
- To provide support, keep accounts secure, prevent abuse and apply plan limits.
- To process subscriptions and coupon codes through Google Play.
- To send service emails and notifications, such as sign-in codes, receipts and replies from support. You can turn off reminders.
- To improve Neutrino using totals and counts, never individual health records.
Health Connect
Neutrino reads and writes only the Health Connect data types you allow, for the features that use them. Our use of information received from Health Connect follows the Health Connect Permissions policy, including its Limited Use requirements. We do not use it for advertising, sell it, or let people read it except as described in "Support access" below.
Support access
Our support team cannot see your health data by default. If you ask for help and a team member needs to look at something (for example why your meter is not syncing), they send a request. You choose Allow or Decline in the app or on the web. If you allow it, access is read-only, limited to what was requested, lasts 30 minutes, can be stopped at any time, and is recorded.
Who we share it with
We never sell your data. We share it only with service providers that help us run Neutrino, under terms that limit how they can use it:
- Hosting and storage: Oracle Cloud (servers) and Cloudflare (website, file storage, email routing, network).
- Email delivery: Postmark.
- Notifications, crash reports and device checks: Google Firebase.
- Payments: Google Play.
- AI providers that process individual AI requests.
- Our customer relationship and helpdesk system, which receives account details (name, email, plan, country, language, usage counts and support history), never health data.
We may disclose information if the law requires it.
Where it is stored
Our main servers are in the United States, and backups are stored with Cloudflare. When data moves between countries we use appropriate safeguards.
How long we keep it
- Account data for as long as you have an account.
- AI coach messages for 90 days, then a short summary replaces them.
- Support tickets for up to 3 years after they close.
- When you delete your account, it is disabled straight away and you have 7 days to change your mind. Then your data and photos are erased. Copies in backups disappear as backups roll over, within 7 days.
Your choices and rights
- See and change your information in the app and on the web.
- Download all your data, or delete your account, from Account settings.
- Withdraw Health Connect or meter access at any time in your phone's settings.
- Depending on where you live (for example in the EU, UK or California), you may have rights to access, correct, delete or move your data, to object to some uses, and to complain to a data protection authority. Email [email protected] and we will respond within 30 days.
Security
We use encryption in transit, strict access controls, two-step sign-in for staff, a permanent log of staff actions, and regular backups that we test.
Children
Neutrino is for adults aged 18 and over. We do not knowingly collect data from children.
Not medical advice
Neutrino gives general lifestyle information. It does not diagnose, treat or give medicine advice. Always follow your doctor's guidance.
Changes
If we make important changes, we will tell you in the app or by email before they take effect.
Contact
Neutrino · [email protected]
