This Privacy Policy explains how Brightwater ("Brightwater", "the app", "we", "us", or "our") handles information in connection with your use of the Brightwater iOS application (bundle identifier xyz.bogtsi.brightwater). Brightwater is developed and operated by an individual developer based in Israel (the "Developer").
We built Brightwater to be private by design. Brightwater has no user accounts, no login, and no backend server operated by us. The data you create in the app stays on your device. The only information leaving your device is handled by the third-party services described below, each under their own privacy policy.
Brightwater is operated by a solo developer based in Israel. For any privacy question or request, contact us at support@bogtsi.xyz.
The following information is created and stored only on your device, inside the app's own sandbox. It is never transmitted to us — we operate no server to receive it — and we cannot access it:
Because this data lives only on your device, it is removed when you delete the app. We provide no cloud backup or sync of this information ourselves; if you use iCloud device backup, your device backup is governed by Apple's policies.
Attaching a photo is optional. When you pick a photo from your library or take one with the camera, iOS presents its own permission prompt first. The photo is then copied into Brightwater's local storage inside the app's sandbox and shown in your diary. Brightwater only reads the photos you explicitly pick; it does not scan your library, and it does not write anything back to your camera roll. Photos never leave your device by way of Brightwater — there is no upload, no cloud, and no server. Deleting a diary entry's photo, or deleting the app, removes the copy the app made.
If you enable reminders, Brightwater schedules local notifications on your device only — for maintenance tasks and, if you set them up, lights-on/lights-off reminders. They are generated and delivered on-device and respect the quiet hours you set. We use no push tokens and send no remote push notifications.
Brightwater can export any tank's data — readings, maintenance completions, livestock (including past inhabitants), and expenses — as a CSV file, on any plan, free or paid. When you tap Export, the app writes the file to its own temporary storage on your device and hands it to the standard iOS share sheet. Where the file goes next is entirely your choice — Files, Mail, another app — and that destination's handling of the file is governed by whatever app or service you choose. The file is not sent anywhere by us. Brightwater can also import a CSV file of parameter readings that you pick from your device: the file is read into the app's local storage on your device only, and nothing about the import is transmitted to us or to any third party.
Brightwater relies on a small number of third-party services. When you use the app, some of these services may collect or process data directly, under their own privacy policies. We map each one below.
| Service | When it applies | What it processes | Purpose |
|---|---|---|---|
| RevenueCat | When you start, restore, or manage a Brightwater Pro subscription | Purchase and subscription data, keyed to a pseudonymous app-user identifier (we never set a user ID, because there are no accounts). No tank data, readings, photos, or any other app content is ever sent to RevenueCat. | To process purchases, validate receipts, and unlock Pro features |
| Apple / App Store | Download, updates, and in-app purchases | Purchase transactions and standard App Store data handled by Apple. Payment is made to Apple with your Apple ID — the Developer never receives or sees your payment card details. | App distribution and payment processing |
| Expo / EAS | App build, distribution, and over-the-air updates | Used to build and ship the app and to deliver JavaScript updates; the app sends no personal data to Expo at runtime as part of Brightwater's features | To build and ship app updates |
We use no analytics or crash-reporting SDKs of our own (no Firebase, Sentry, Amplitude, or similar), and Brightwater's own code makes no network requests to any server we operate.
Brightwater contains no advertising and no advertising SDK. The app displays no ads, contains no third-party ad or tracking framework, and does not collect or use the advertising identifier (IDFA). The app's privacy manifest declares that it does not track you, and because nothing in the app tracks you, Brightwater never presents Apple's App Tracking Transparency prompt. If advertising were ever introduced in a future version, this Privacy Policy would be updated before it shipped.
The services above process data under their own privacy policies, which we encourage you to review:
We ourselves do not collect or receive your personal data on any server. Information is used only for the purposes described above: providing app features on-device (tank logs, charts, maintenance reminders, lighting plans, the cycle assistant, livestock records, the diary, expenses, streaks, CSV export) and processing subscriptions. We do not sell your personal data, and we do not use it for advertising or profiling.
Data stored locally on your device is retained until you delete it in the app or uninstall the app. Data processed by third parties (RevenueCat, Apple) is retained according to their respective policies.
Brightwater is not directed to children and is not intended for use by anyone under the age of 13 (or the minimum age of digital consent in your jurisdiction, such as 16 under the GDPR). We do not knowingly collect personal information from children. In line with the U.S. Children's Online Privacy Protection Act (COPPA) and the GDPR's protections for children, if you believe a child has provided personal information through the app, please contact us at support@bogtsi.xyz and we will take appropriate steps.
The Developer is based in Israel. Brightwater is available through the Apple App Store internationally. The third-party services we use (RevenueCat, Apple, Expo) may process data in various countries, including the United States, in accordance with their own policies and legal safeguards. Your tank data, readings, photos, and diary are not part of any such transfer — they never leave your device. By using the app, you understand that the limited subscription information described above may be processed in countries other than your own.
Because your app data stays on your device, its security is tied to your device's own protections (passcode, encryption, biometric lock). Data handled by third-party services is protected under their respective security practices. No method of storage or transmission is 100% secure.
We may update this Privacy Policy from time to time. When we do, we will revise the "Last updated" date above and post the new version at this URL. Material changes will be reflected here; your continued use of the app after an update constitutes acceptance of the revised policy.
Questions about this Privacy Policy or your data? Email support@bogtsi.xyz.