HOIA

Privacy Policy

Last updated: 12 August 2026

1. Introduction

This Privacy Policy describes how the Hoia mobile application (“Hoia”, “the app”) handles information when you use it. Hoia is designed for calm weight maintenance through simple morning and evening check-ins.

In short: You can use Hoia free without an account — recent check-ins and your profile stay on your device. If you create an optional account and subscribe to Premium, we store your account email and sync check-in data to our servers for backup, multi-device use, longer history, and AI coaching. We also use limited analytics and crash reporting to improve the app, as described below.

2. Who we are

Hoia is owned, developed, and published by Shtern Consulting OÜ (Estonia), registry code 12409467, Pallase pst 23, Tartu 51011, Estonia.

Shtern Consulting OÜ is the data controller for Hoia and the legal entity shown as the App Store / Google Play seller for the app.

Questions about this policy: contact@hoia.eu.

3. Data stored on your device

When you use Hoia, the following information may be stored locally on your device:

  • Your preferred name
  • Target weight and optional current / start weight
  • Morning check-ins (weight, sleep quality, optional notes)
  • Evening check-ins (hunger, cravings, mood, plan adherence, water, movement, optional notes)
  • Personal factors (custom yes/no habits) and related daily responses
  • Language preference and optional reminder times
  • Onboarding and app preferences needed for the app to function
  • Session tokens if you sign in (kept on the device until you sign out)

Free use keeps a rolling recent history on the device (about 30 days). Uninstalling the app, resetting app data, or clearing site data (on web) may permanently delete local data.

4. Optional account (sign-in)

An account is optional. Free features do not require sign-in. If you choose to sign in, we use passwordless magic-link authentication:

  • You provide an email address in the app
  • We email a one-time sign-in link (via hoia.eu) and store only a hashed token server-side until it expires or is used
  • After verify, we keep an account record keyed by your email and a session token

We use your email to authenticate you, send sign-in links, and manage your Premium entitlement. We do not sell email addresses.

5. Premium, cloud sync, and AI coaching

With an active Premium subscription (and while signed in), Hoia may:

  • Sync check-in and profile data to our servers (hosted for hoia.eu) so you can restore recent history across devices and access longer history in the app
  • Store personal factors / habit definitions and their daily yes/no responses in the cloud for the same purpose
  • Generate a short daily coaching note by sending recent check-in context (for example weights, ratings, factors, and notes you entered) to an AI provider (currently OpenAI) on our servers; the model returns a coaching note we show in the app

Cloud sync and coaching are Premium features. If you cancel, paid features continue until the end of the paid period; cloud data is retained for a limited grace period after that (about 30 days), then deleted from our servers according to our retention process. Signing out stops cloud sync on that device but does not by itself delete your cloud account data.

6. Purchases and subscriptions

Premium is sold as an in-app subscription through Apple App Store and/or Google Play. We use RevenueCat to help validate and manage entitlements. Apple, Google, and RevenueCat process purchase and subscription status according to their policies. We receive subscription status needed to unlock Premium features; we do not receive your full payment card details.

7. Notifications

If you enable morning or evening reminders, the app may schedule local notifications on your device. Notification permissions are handled by your operating system. We do not receive the content of your check-ins through notifications.

8. App diagnostics and anonymous usage

To understand how Hoia is used and to fix problems, the app may send limited technical and usage information to service providers:

  • Anonymous product analytics (PostHog, hosted in the EU) — for example which screens are opened, whether onboarding or check-ins are completed, or settings are changed. We do not send your check-in content (weights, ratings, notes) in analytics events.
  • Crash and error reporting (Sentry) — for example crash reports, error messages, and basic device and app version information to help diagnose bugs.

Analytics uses a random identifier on your device; we do not use it to identify you personally. These providers process data on our behalf according to their own privacy policies: PostHog, Sentry, OpenAI, RevenueCat.

9. Data sharing

We do not sell your personal data. We do not share your check-in data with advertisers or data brokers.

We share data with processors only as needed to run the app: hosting and email for accounts and sync, AI providers for Premium coaching, analytics/crash tools, and app stores / RevenueCat for subscriptions.

If you voluntarily submit a message through an in-app contact or feedback form, we receive the information you enter (such as name, email, and message) so we can respond.

Standard platform providers (Apple, Google, or your device manufacturer) may process limited technical data related to app distribution and updates according to their own policies.

10. Your choices

You can:

  • Use Hoia free without creating an account
  • Update or delete entries within the app where editing is supported
  • Change language and reminder settings
  • Reset all local app data from Settings (deletes local profile and check-in history on that device)
  • Sign out to end the session on that device
  • Delete your account in the app (Settings → Account → Delete account) to permanently remove your Hoia account and associated cloud data. Local data on the device is not wiped automatically; use Settings reset or uninstall. Deleting the account does not cancel a store subscription — manage that in Apple / Google subscription settings.
  • Manage or cancel Premium in your Apple / Google subscription settings
  • Uninstall the app to remove locally stored data from your device
  • Request access, correction, or help with deletion by emailing contact@hoia.eu
  • Read our Terms of Use for subscription and account rules

11. Children

Hoia is not directed at children under 16. We do not knowingly collect personal information from children. If you believe a child has provided us with personal data, contact contact@hoia.eu.

12. Changes to this policy

We may update this Privacy Policy from time to time. When we do, we will revise the “Last updated” date above. Material changes may also be noted in app release notes where appropriate.

13. Contact

Questions about privacy: contact@hoia.eu