Privacy Policy

1. Introduction

Welcome to Chronix ("we," "our," or "us"). This privacy policy explains what information Chronix handles when you use our Android and iOS applications (the "App"), what leaves your device, and the choices you have. By using Chronix, you agree to the practices described in this policy.

In short: Chronix has no ads and no advertising ID. You use it as a guest or sign in with Google or, on iOS, Apple. Your countdowns are kept on your device and, so that they can follow you between your devices, on our server. You can delete your account and its data inside the App (how). The App can also send anonymous usage statistics and crash reports, and you can switch both off in Settings → Privacy.

2. Information We Collect

2.1 Your account

When you first open the App you continue as a guest or sign in with Google or, on iOS, Apple.

• Guest — the App creates an anonymous account identified only by a random ID. It has no name, email address or password.
• Google sign-in — Google tells the App your email address and a Google account identifier. Our sign-in provider may also store the other basic profile details Google returns (such as your name and profile picture) as part of the sign-in record; Chronix does not use or show them. Chronix never sees your Google password.
• Sign in with Apple (iOS) — Apple tells the App an Apple account identifier and your email address, which is either your real address or, if you choose to hide it, a private relay address that forwards to you. The App asks for the email address only, not your name. Chronix never sees your Apple password.

If you add Google or Apple to a guest account, your countdowns stay with you. If that Google or Apple account already has a Chronix account, you are signed in to it and the countdowns on this device are added to it.

2.2 Your countdowns (data you create)

Your countdowns (title, date and time, time zone, category, color, icon, notes, pinned and archived state, reminder and repeat settings) are stored in the App's private storage on your device and, so that they can appear on your other devices, on our server under your account. This applies to guests too. When you delete a countdown, a deletion mark is kept on the server so that your other devices learn about the deletion.

Not synced: your settings, theme and widget configuration, which calendar event a countdown came from, and whether you bought Premium. One account can hold up to 1,000 countdowns.

2.3 Calendar data

If you choose Import from calendar, Chronix asks for read-only access to your calendar (READ_CALENDAR on Android, calendar access on iOS). Events are read on your device and shown to you; only the events you select are copied into Chronix as countdowns. Your calendar itself is not transmitted anywhere, but a countdown you create from an event is a countdown like any other and is synced as described above. You can hide this feature in Settings and revoke the permission at any time in your device's settings.

2.4 Notifications, widgets and alarms

Reminders and milestone notifications are scheduled and delivered locally on your device. On Android, Chronix uses the notification permission, exact alarms and a boot receiver only so reminders arrive on time and are re-scheduled after a restart. On iOS it uses local notifications.

On iOS, the home screen and Lock Screen widgets and the Live Activity that shows your next countdown on the Lock Screen and in the Dynamic Island during its final 24 hours are drawn from countdown data kept on your device, in a storage area shared only between the App and its widgets. Nothing is sent anywhere for them.

2.5 Usage analytics (optional)

The App uses Firebase Analytics (Google) to understand how features are used. It records anonymous events such as a countdown being created, edited, reached or deleted, together with its category, how many days away it is, and whether it has a reminder or repeats. It also records, when the free countdown limit stops you from adding another one and when you open the Premium screen, which button opened it, which plan you looked at or started to buy, and whether a purchase went through. These events carry no name, email address or payment details. Firebase also collects some technical information automatically, such as a random app-installation identifier, app version, device model, operating system version (Android or iOS) and language, and approximate region.

Chronix does not send your countdown titles, notes or dates, your calendar content, your contacts, or your advertising ID. Ad personalization is disabled. Usage analytics is on by default and can be switched off in Settings → Privacy → Usage analytics; once off, no analytics data is collected.

2.6 Crash reports (optional)

The App uses Firebase Crashlytics (Google) to find and fix crashes. A crash report contains technical details such as the stack trace, the app version, device model, operating system version, and the state of the device at the time of the crash, together with the app-installation identifier. A syncing problem that is more than a missing network connection is also recorded as a technical error report: the kind of error and its message, never your countdowns. Crash reports are on by default and can be switched off in Settings → Privacy → Crash reports.

2.7 Purchases

On Android, Premium is available as a monthly subscription, a yearly subscription or a one-time Lifetime purchase, all handled by Google Play. Google processes the payment and shows the price in your currency; Chronix only learns whether an active purchase exists so it can unlock Premium. Chronix never sees or stores your card or payment details.

Subscriptions renew automatically until you cancel them in Google Play (Play Store → your profile → Payments & subscriptions → Subscriptions, or Settings → Manage subscription in the App). Cancelling stops the next renewal, and Premium stays until the end of the period you already paid for. Premium is tied to your Chronix account (a guest account included), so it follows you to a new phone when you sign in to the same account; if it does not appear, choose Restore purchases.

On iOS, Premium is available as the same monthly subscription, yearly subscription and one-time Lifetime purchase, all handled by the App Store (Apple). Apple processes the payment and shows the price in your currency; Chronix only learns whether an active purchase exists so it can unlock Premium, and never sees or stores your card or payment details. Subscriptions renew automatically until you cancel them at least 24 hours before the end of the current period, in your Apple Account's subscription settings (or Settings → Manage subscription in the App, which opens them). A free trial, where offered, turns into a paid subscription unless you cancel it before it ends. Premium follows your Chronix account in the same way, and Restore purchases brings it back if it does not appear.

Purchases are managed with RevenueCat (RevenueCat, Inc.), a subscription service. To check and keep your Premium, RevenueCat receives your random Chronix account ID, the purchases made with it (which plan, when, and whether it is active) and basic technical data such as your IP address and device type. It receives no name, email address or payment details. RevenueCat acts for us as a service provider; see the RevenueCat privacy policy.

2.8 App updates

From version 1.5.0, when a release is marked as required, the Android app asks Google Play to install it and shows Google Play's update screen. The download and installation are done by Google Play; Chronix does not send anything to us for this.

2.9 Backups and sharing you start

On Android, Export countdowns saves a file to a location you choose, and Import countdowns reads a file you choose. When you share a countdown as an image or text, it goes only to the app you pick in your device's share sheet. Chronix does not transmit these files or images itself.

3. How We Use Your Information

• Provide core functionality — creating, displaying and managing countdowns, including home screen widgets, the Quick Settings tile and launcher shortcuts on Android, and home screen and Lock Screen widgets and Live Activities on iOS
• Accounts and sync — signing you in and keeping your countdowns the same on your devices
• Calendar import — reading calendar events you choose to add as countdowns
• Reminders — scheduling and delivering local notifications
• Premium — confirming your purchase through Google Play or the App Store, and RevenueCat
• App improvement — analyzing anonymous usage data and crash reports to fix bugs and improve features (only while those switches are on)
• Compliance — fulfilling legal obligations where applicable

4. Permissions Summary

5. Data Sharing & Third-Party Services

Chronix does not sell, trade or rent your personal information, and it shows no ads. These service providers process data on our behalf for the limited purposes above:

• Supabase — hosts your account and your synced countdowns (in Europe). See the Supabase privacy policy.
• Google Sign-In (Google LLC) — signing in with your Google account, only if you choose it. See the Google Privacy Policy.
• Firebase Analytics and Firebase Crashlytics (Google LLC) — anonymous usage statistics and crash reports on Android and iOS, optional. See Firebase privacy information.
• Sign in with Apple and the App Store (Apple Inc.) — signing in with your Apple account, only if you choose it, and purchases on iOS. See the Apple Privacy Policy.
• Google Play (Google LLC) — purchases on Android.
• RevenueCat (RevenueCat, Inc.) — checks purchases and keeps Premium on your account. See the RevenueCat privacy policy.

We do not share your calendar data or the content of your countdowns with anyone else.

6. Data Security

Your countdowns are stored on your device, protected by the operating system's app sandbox, and on our server, where access rules let each account read and change only its own countdowns. The sign-in session kept on your device is stored encrypted (Android Keystore, iOS Keychain) and is excluded from device backups. Data travels over encrypted connections (TLS). However, no method of electronic storage or transmission is 100% secure.

7. Data Retention, Deleting Your Account and Device Backup

Your account and its countdowns stay on our server until you delete them. Countdowns also remain on your device as long as the App is installed; you can delete them there by uninstalling the App or clearing its data. On Android, the database, the sign-in session and the sync position are excluded from Google cloud backup; when you set up a new phone with device-to-device transfer, the countdown database may be copied to it, but you sign in again. Analytics and crash data held by Google is kept under Firebase's standard retention settings. Switching a privacy switch off stops new collection.

7.1 Deleting your account

You can delete your account and its data at any time in the App: Settings → Account → Delete account, then confirm. This permanently deletes your account and all the countdowns stored under it on our server. It cannot be undone. Countdowns that are on the device you used stay there until you remove them, and anonymous analytics and crash data (which is tied to a random installation identifier, not to your account) is not removed by deleting the account.

If you cannot open the App, email support@vnsapp.app from the email address of your Google or Apple account (if you hid your address with Sign in with Apple, tell us the private relay address shown in your Apple Account settings) and ask us to delete your Chronix account; we will do so within 30 days. A guest account has no email address that identifies it, so it can only be deleted in the App on the device where it was created.

If you signed in with Apple, deleting your account in the App does not remove Chronix from your Apple Account's list of apps that use Sign in with Apple. To remove it there as well, open Settings → your name → Sign in with Apple, choose Chronix and stop using your Apple Account with it.

8. Children's Privacy

Chronix is not directed to children under the age of 13. We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will take steps to delete such information.

9. Your Rights and Choices

You can use Chronix as a guest instead of signing in with Google or Apple, switch usage analytics and crash reports off in Settings → Privacy on Android, revoke the calendar and notification permissions in your device's settings, and delete your account in the App. On Android, Export countdowns gives you a copy of your countdowns in a file. The personal data we hold about you is limited to your account (a random ID and, if you signed in with Google or Apple, your email address, which for Apple may be a private relay address), your countdowns, and the anonymous analytics and crash data described above. Depending on your jurisdiction you may also have the right to:

• Access — request a copy of data we hold about you
• Deletion — request deletion of your data (see Deleting your account)
• Correction — request correction of inaccurate data
• Portability — request your data in a portable format
• Objection — object to processing of your data

To exercise these rights, please contact us using the information below.

10. Changes to This Policy

We may update this privacy policy from time to time. Any changes will be posted on this page with an updated "Last updated" date. We encourage you to review this policy periodically. Continued use of the App after changes constitutes acceptance of the updated policy.

11. Contact Us

If you have any questions about this privacy policy or our practices, please contact us at:

Email: support@vnsapp.app
GitHub: github.com/AAyar94/Chronix