← Fasting with Purpose

Privacy Policy

Last updated September 24, 2026

Draft. This document is under legal review and may change before it is final. If anything here is unclear, email hello@fastingwithpurpose.com.

The short version. You enter your own progress, including body measurements if you choose to. Only you can see your measurements and reflections in the app. The admin view shows account activity (which day you're on, whether you're logging) and is built so it never receives your body data. We don't sell your information or use it for advertising. Email hello@fastingwithpurpose.com and we'll delete everything.

Who we are

Fasting with Purpose (fastingwithpurpose.com) is the companion app for the book Fasting with Purpose. It is operated by Dylan C. Herlehy (“we”, “us”). Questions or requests about your information: hello@fastingwithpurpose.com.

What we collect

Your account

  • Email address, used to sign you in with a one-time link.
  • Sign-in records kept by our authentication provider for security: when you signed in, your browser type, and the IP address the sign-in came from.

What you enter in the program

  • Profile: first name, your Day 1 date, and your fasting window.
  • Optional baseline: weight, waist, body fat percentage, sleep, mood, and a written purpose statement.
  • Daily logs: which of the daily laws you kept, optional weight, waist and energy, and your written answers to the daily reflection questions.
  • Day 90 results: the identity statements you write at the end of the program.

Body measurements, sleep, mood, energy and fasting habits are health-related information. All of it is optional: the program works without it. We use it only to show you your own progress.

Reminder settings

  • Your time zone (read from your browser) so reminders arrive at your local times.
  • Which reminders you have on, and the date each type was last sent, so you never get the same one twice in a day.

Technical information

  • Cookies: only the ones that keep you signed in. No advertising or tracking cookies.
  • Analytics: anonymous page-view counts through Vercel Web Analytics, which uses no cookies. We remove everything after the “?” in each address before it is sent, and the admin page is never counted.
  • Error reports: if the app crashes or fails to save, a report goes to our error-monitoring provider so we can fix it. Reports are stripped before they leave: no IP address, no cookies, no request contents (so none of your logged data), no values from inside the code, and no screen recording. Reports pass through our own server, so the provider never sees your IP address.

How we use it

  • To run the program: show your day, save your logs, and track your progress.
  • To send sign-in links, and the reminder emails you choose to receive.
  • To support you if something goes wrong, and to keep the service secure.
  • To understand, in aggregate, how people move through the 90 days so the program can improve.

We do not sell or rent your information, share it for advertising, or use your health information for marketing.

Who can see it

You

Everything you enter is tied to your account. The database only lets a signed-in account read and change its own record.

The admin view

We have an admin dashboard for supporting readers. It shows account activity: your name and email, which program day and phase you're on, how many days you've logged, your streak, the share of daily laws kept, the last day you logged, your fasting window, and whether reminders are on.

It does not show body measurements, sleep, mood, energy, reflections, your purpose statement, or your Day 90 results. Those are removed on the server before the admin page is built, so they never reach the admin's browser.

As the operator of the service, we also have technical access to the underlying database. We look at raw records only to fix a problem, when you ask us to, or when the law requires it.

Service providers

These companies process information on our behalf to run the app:

  • Supabase: database and sign-in. Your account and program data are stored in Canada (Montréal, AWS ca-central-1).
  • Vercel: website hosting and anonymous analytics (United States).
  • Resend: delivery of sign-in and reminder emails (United States).
  • Sentry: error monitoring, with the protections described above (United States).

The book link goes to Amazon. Once you're on Amazon, its privacy policy applies.

We may also disclose information if the law requires it, to protect someone's safety, or as part of a transfer of this service to a new operator, who would be bound by this policy.

Emails

  • Sign-in links are sent when you ask for one. They are part of using your account.
  • Reminders: when your eating window opens, an 8 pm nudge if the day isn't logged, a Sunday weekly review, and a restart note after several unlogged days. They are on when you start. Turn any of them off under Me in the app, or use the unsubscribe link in any reminder (it asks you to confirm before turning them off). The address used is always the one you sign in with.

How long we keep it, and deleting it

We keep your information while your account exists. To delete your account, email hello@fastingwithpurpose.com from the address you sign in with. We will delete your account and all of your program data within 30 days. Copies in routine database backups are overwritten on the backup schedule after that.

You can also ask for a copy of your data, or correct it. Most of it you can edit directly in the app.

Security

Traffic is encrypted (HTTPS). Database rules stop one account from reading another's records, and the keys that can bypass those rules are kept on the server only. No system is perfectly secure. If we learn of a breach affecting your information, we will tell you.

Where it is processed

We operate from the United States. Your program data is stored in Canada (Montréal, AWS ca-central-1), and our other providers process data in the United States. By using the app, you understand your information will be handled in those countries.

Age

The app is for adults 18 and older. We do not knowingly collect information from anyone under 18. If you believe someone under 18 has signed up, email hello@fastingwithpurpose.com and we'll delete the account.

Your rights

Depending on where you live, you may have rights to access, correct, delete, or get a copy of your personal information, and to withdraw consent. We honor these requests for everyone, wherever you live. Email hello@fastingwithpurpose.com.

Not a medical service

Fasting with Purpose is not a healthcare provider, and the app is not medical advice. Your information here is not a medical record.

Changes to this policy

If we change this policy, we'll update the date at the top. If a change materially affects how we use your information, we'll email you before it takes effect.

Contact

Dylan C. Herlehy · hello@fastingwithpurpose.com

Privacy Policy · Terms of Use · hello@fastingwithpurpose.com