Hourglass

Privacy Policy

Last updated: 9 November 2026

Hourglass is an intermittent fasting tracker operated by Fares Alshammari ("we"). This policy explains what data the app stores, why, and the choices you have. We do not sell your data or use it for advertising.

Data you give us

  • Account: email address, name and password. Passwords are stored only as a secure one-way hash.
  • Profile (optional): gender, date of birth, height, starting and goal weight, language, theme and time zone.
  • Tracking: your fasts, eating windows and drinks, weight logs, body measurements, goals, achievements and daily challenges.
  • Circles: circles you create or join, reactions and invites. Members of a circle can see the activity you share with it, according to that circle's privacy setting.
  • Safety: reports you send about a circle or a member (with the text that was reported), and the people you block. The person you report is not told who reported them.
  • Ramadan mode (optional): if you turn it on, the location you choose is used to look up prayer times.

Data collected automatically

  • Login sessions: a cookie keeps you signed in. For each session we store your device's browser/app description and a hashed (not readable) form of your IP address, so you can see and sign out other sessions.
  • Notifications: if you allow push notifications, we store your device's push subscription (on iPhone, the device's push token) so we can send reminders and messages. Signing out of the iPhone app removes the token.
  • Usage analytics and crash reports (off by default): only if you turn on “Share anonymous usage data”, the app sends usage events to PostHog and error reports to Sentry. You can turn this off at any time in Settings.

Apple Health

The iPhone app can connect to Apple Health. It is off until you turn it on in Settings → Apple Health, one switch for each kind of data:

  • Weight (read and write): weights you log in Hourglass are saved to Health, and new weights in Health (for example from a smart scale) are added to your Hourglass weight log.
  • Steps and active energy (read only): shown on the Home screen.
  • Sleep (read only): last night's sleep, shown on the Home screen.

Steps, active energy and sleep stay on your iPhone and are never sent to our servers. Only the weights in your weight log are saved to your Hourglass account. Health data is used only to show you these features. It is never used for advertising or marketing, never sold, and never shared with anyone. You can change or remove access at any time in the Health app.

How we use your data

We use your data only to run the app's features for you: timing fasts, showing stats and progress, reminders, circles and Ramadan prayer times, and, if you opted in, to find bugs and improve the app.

Who we share it with

  • Aladhan (aladhan.com): receives the coordinates you chose, only when Ramadan prayer times are requested.
  • PostHog and Sentry: only if you opted in to usage data, as described above.
  • Your push notification provider (Apple, Google or Mozilla), which delivers notifications to your device. On iPhone, this is Apple Push Notification service.
  • Google Fonts: the app loads its fonts from Google, which receives your IP address as part of that request.
  • Other circle members: the activity you share with circles you joined.

We do not sell or rent your data, and we do not share it with advertisers.

Storage and security

Data is stored in the app's database on servers we control and is sent over encrypted connections when the app is accessed over HTTPS. Passwords are hashed with bcrypt.

Your choices and rights

  • Delete: delete your account from Settings. This permanently removes your account and all of your data.
  • Analytics: turn usage data on or off at any time in Settings.
  • Notifications and location: you can withdraw these permissions at any time in your device settings.

To get a copy of your data, or to correct or delete it, email us at [email protected].

Children

Hourglass is not intended for children under 16 and we do not knowingly collect their data. Fasting is not recommended for children.

Changes

If we change this policy, we will update the date above and, for significant changes, tell you in the app.

Contact

Fares Alshammari — [email protected]