Daywell Privacy Policy
Effective October 20, 2026
The short version
- Your diary is about your health, so we treat all of it as sensitive.
- We use it only to run Daywell for you. We don’t sell it, show you ads, or use tracking or analytics tools.
- If you use the Assistant, your question and a summary of your recent diary are sent to Anthropic’s AI to write the answer. Nothing is sent unless you ask a question.
- Weather uses your approximate location (rounded to about 1 km), and only if you allow it.
- You can delete entries, clear your diary, or delete your account at any time, right in the app.
Who we are
Daywell is a personal health diary made by Ramin Partovi, an individual developer based in the United States (“Daywell”, “we”, “us”). This policy covers the Daywell apps for iPhone and Android and the web app at app.daywell.site. If you have a question or a request about your data, email rpartovi123@gmail.com.
What we collect
Your account
Your email address, your first name if you give it, and your password (stored only as a secure hash by our sign-in provider; we never see it). If you sign in with Google or Apple, they share your email address and, if you allow it, your name. With Apple you can choose to hide your email; we then get a private relay address instead.
Your diary
Everything you enter, which can include health information:
- symptoms you track, how severe they were (1–5) and any notes
- foods and meals you ate, and meals you save
- mood, stress and energy check-ins, with any notes
- how long and how well you slept
- your setup answers: the symptoms you track, your goals and foods you suspect
- small app settings, such as your Daywell pet
Weather and approximate location
To link your entries with the weather, Daywell asks for your location once a day while you use it. We round it to about 1 km before using it, then save that rounded position with the day’s weather (temperature, humidity, pressure, rain). We don’t track where you go. If you don’t allow location, Daywell simply skips the weather.
Assistant questions
When you ask the Assistant a question, we send what’s described in The Assistant and AI below. We don’t store your questions or the answers on our servers; the current conversation stays on your device. To enforce the weekly question limit, we keep a record of when you asked (not what you asked).
Technical information
Like any online service, our hosting providers receive your IP address and basic request details when the app connects to them, and keep short-term logs for security and reliability. For the Assistant, our server logs whether each request succeeded, how long it took and how much AI capacity it used. It never logs your messages, your diary or who you are.
What we don’t collect
No advertising IDs, no analytics or tracking tools, no contacts, photos or files, and no data from Apple Health, Google Health Connect or wearables.
How we use it
- to run your account and keep your diary in sync across your devices
- to show your patterns and insights, such as foods that may be linked to your symptoms
- to answer your Assistant questions and make the doctor report you ask for
- to keep Daywell secure, prevent abuse and fix problems
- to reply when you contact us
We don’t use your data for advertising, sell it, or use it to train AI models. The doctor report (PDF) is made on your device and goes only where you choose to save or share it.
The Assistant and AI
The Assistant is optional, and it asks your permission on each device before it shares anything. You can withdraw that permission any time in Manage → Your data. Once you’ve allowed it, when you ask it something, Daywell sends your question, the last few messages of the conversation, a summary of your last 90 days of diary entries (including your notes and the weather) and your setup answers (your first name, goals and suspected foods) to our server, which passes them to Anthropic, the company that makes the Claude AI models. Anthropic first checks that the question is about your health diary, then writes the answer. Your email address and account ID are not included.
Anthropic processes this data for us under its commercial terms: it does not use it to train its models and keeps it only for a limited time for safety and legal reasons. The Assistant’s answers are generated by AI and can be wrong. They are not medical advice.
Who we share it with
We share data only with the service providers that run Daywell, only what each one needs, and only to provide the service to you:
| Provider | What it does | What it receives |
|---|---|---|
| Supabase | Accounts, sign-in and the database that syncs your diary (stored in the United States) | Your account and your whole diary |
| Vercel | Hosts the web app and the Assistant’s server (United States) | Assistant requests as they pass through, and IP addresses |
| Anthropic | AI that answers Assistant questions | Your question, recent messages, a 90-day diary summary and your first name, only when you ask |
| Open-Meteo | Weather data | Your rounded location and IP address, without anything about you |
| Have I Been Pwned | Checks new passwords against known data breaches | The first 5 characters of a scrambled (hashed) form of the password, never the password itself |
| Google or Apple | Sign-in, if you choose it | That you are signing in to Daywell |
We may also disclose information if the law requires it, to protect someone’s safety, or as part of a transfer of Daywell to a new owner, who would have to keep this policy’s promises. We never sell your data or share it for advertising.
Where it’s stored and how it’s protected
Your diary is stored on your device and in our database in the United States. Data is encrypted in transit (HTTPS) and at rest, and each account can only read its own rows. When you sign out, Daywell deletes the copy of your diary on that device (your account keeps it). No system is perfectly secure, but we’ll tell you without undue delay if a breach affects your data.
How long we keep it
- Your diary and account: until you delete them.
- Deleting an entry or using Clear all data removes it from your devices right away and erases its content from our database as soon as it syncs. All we keep is a placeholder with the entry’s random ID and when it was deleted, so your other devices know to remove it too; that goes when you delete your account. Copies in our provider’s backups are replaced within a few weeks.
- Deleting your account (Manage → Delete account) permanently erases your account and all of your diary from our database right away. Copies in our provider’s backups are replaced within a few weeks.
- Assistant limits: the times of your recent questions, kept to count your weekly limit and erased with your account.
Your choices and rights
Wherever you live, you can:
- see, edit and delete your entries in the app
- turn off location for Daywell in your phone’s settings, or not use the Assistant
- delete your account and all of your data in the app, under Manage
- ask us for a copy of your data, a correction, or deletion, by emailing rpartovi123@gmail.com. We may need to confirm the request comes from your account’s email, and we’ll reply within 30 days.
US consumer health data
Some US states, including Washington and Nevada, give extra rights over “consumer health data”. Everything in your diary may count as consumer health data. We collect it only to provide the diary you ask for, share it only with the providers listed above to do that, and never sell it. You can ask to see what we have, which providers received it, and to delete it, as described above. If we turn down a request, you can appeal by replying to our answer; if you’re still not satisfied, you can contact your state Attorney General.
European Economic Area, UK and Switzerland
We process your data to provide the service you signed up for, with your explicit consent for health information (which you give by entering it, and can withdraw by deleting it or your account), and for our legitimate interest in keeping Daywell secure. You have the right to access, correct, delete, restrict or object to processing of your data, and to receive it in a portable format. Your data is processed in the United States; our providers protect transfers with the European Commission’s Standard Contractual Clauses or equivalent safeguards. You can also complain to your local data protection authority.
Children
Daywell isn’t meant for children under 13, or under 16 where local law sets a higher age to consent to data processing. We don’t knowingly collect their data; if you think a child has given us data, email us and we’ll delete it.
Not medical advice
Daywell helps you notice patterns, but it isn’t a medical device and doesn’t diagnose or treat anything. Talk to a doctor about your health, and call your local emergency number in an emergency.
Changes to this policy
If we change this policy, we’ll update the date at the top. If a change affects how we use data you’ve already given us, we’ll tell you in the app before it takes effect.
Contact
Ramin Partovi, Daywell
rpartovi123@gmail.com