The DayXero app
Stored on your device. Your Quit Day, nicotine use, cravings, slips, notes, program progress and any health details you enter (such as height and weight) are stored on your iPhone. Home Screen and Lock Screen widgets read the same data on your device. We don't run a server that receives this data, and you don't need an account.
Purchases. Apple processes all payments. We use RevenueCat to check which plan you have. RevenueCat receives an anonymous app user ID and your purchase details from Apple, not your name, email or payment card.
Usage analytics. To improve the app, it sends anonymous usage events to a product analytics service, such as which screens you open, when you start a program day and whether a craving session was completed. These events never include what you write or log, or your health details.
Notifications. Reminders are scheduled on your device and you can turn them off at any time in iOS Settings.
This website
- Hosting. dayxero.app is served by Cloudflare, which processes technical data such as IP addresses to deliver the site and protect it from abuse.
- Analytics. We use Cloudflare Web Analytics, which counts visits without cookies and without tracking you across other sites.
- Fonts. Pages load fonts from Google Fonts, so your browser connects to Google's servers.
- No cookies, no ads. The website sets no cookies and shows no advertising. It uses your browser's own storage for two small conveniences: remembering a referral code during your visit, and remembering for 7 days that you closed the beta bar on guide pages.
The beta list
If you join the DayXero beta list, here is what happens to your email address.
- What we collect. Your email address, the page and form you signed up from, the plan you said you're interested in (if any), the referral code that brought you (if any), your approximate country from Cloudflare, the time you joined and confirmed, the consent wording you agreed to, and a one-way hash of your IP address used only to stop spam signups.
- Why. To send you a confirmation link, your TestFlight invite, the App Store link and your founding offer at launch, and occasional beta updates. We use it for nothing else, and we process it because you asked us to (your consent).
- Who handles it. Cloudflare stores the list and may check that you're not a bot (Cloudflare Turnstile). Resend sends the confirmation email. If we send the launch email through an email service such as Kit or Brevo, they will hold a copy of confirmed addresses for that purpose only.
- How long we keep it. Until you unsubscribe, or 12 months after DayXero launches, whichever comes first. Unconfirmed signups are deleted after 30 days.
- Leaving. Every email has a one-click unsubscribe link, or email hello@dayxero.in and we'll delete your address.
- Age. The beta list is for people 18 and over.
Who we share data with
Only the service providers named above, and only so they can do their job for us. We don't sell your data or share it with advertisers, and we don't share it with tobacco or nicotine companies.
Your choices
- Delete your data by deleting the app. Because your quit data lives on your phone, this removes it.
- Ask us anything about your data, or ask us to delete analytics data linked to your anonymous ID, by emailing hello@dayxero.in.
Children
DayXero isn't directed at children under 13, and we don't knowingly collect data from them.
Changes to this policy
If we change this policy, we'll update the date at the top of this page. For significant changes, we'll also tell you in the app.
Contact
Questions about privacy: hello@dayxero.in