Pool Calculator privacy policy
The short version: Pool Calculator keeps everything you enter on your own device. We do not run accounts, we do not collect analytics, we show no ads, and we never sell data. The only third party involved is the company that handles in-app purchases.
What the app stores, and where
Pool Calculator saves the information you enter in a local database (SQLite) inside the app's private storage on your phone. That includes:
- Pool profiles: name, volume, surface type, sanitizer type and related settings.
- Test readings you enter (free chlorine, combined chlorine, pH, alkalinity, calcium, CYA, salt) with their dates.
- Test reminder schedules.
- Settings such as your preferred units.
None of this leaves your device unless you export it yourself. We have no server that receives it, and we cannot see it.
Your phone's own backup (for example iCloud or Google backup) may include the app's data, under Apple's or Google's terms, if you have backups turned on.
Exports you choose to share
You can export all of your pools and readings as a JSON file from Settings. An export happens only when you tap the export button; you pick where the file goes using your phone's share sheet, and whatever app or service you send it to handles it under its own policy.
Notifications
If you turn on test reminders, the app asks for permission to show notifications so it can remind you when a test is due. The permission request appears only when you set up a reminder, and you can turn notifications off at any time in your phone's settings. Reminders are scheduled locally on the device; no push server is involved.
In-app purchases
Paid features are sold through the App Store and Google Play. To unlock them and to restore purchases, the app uses RevenueCat. RevenueCat receives an anonymous app-user identifier (a random ID generated on your device, not linked to your name or email) and purchase receipt information from the store. It uses this to confirm which features you have paid for. RevenueCat's handling of that data is described in the RevenueCat privacy policy. Apple and Google process the payment itself under their own privacy policies; we never see your payment details.
What we do not do
- No analytics or usage tracking in this version of the app.
- No advertising or ad networks.
- No accounts, sign-in or email collection.
- No selling, renting or sharing of personal data with anyone.
Children
Pool Calculator is a general-purpose utility and is not directed at children under 13. We do not knowingly collect personal information from children; as described above, the app does not collect personal information from anyone.
Deleting your data
Because the data is stored only on your device, uninstalling Pool Calculator removes all of it. You can also delete individual records inside the app. If you exported a file, delete that file wherever you saved it. There is nothing for us to delete on our side, because we never received it.
Future changes
If a future version adds optional features that move data off the device, such as syncing or pairing between two phones, we will update this policy first and tell you inside the app before anything is sent. Features like that will be opt-in. The effective date at the top of this page changes whenever the policy does.
Contact
Questions about privacy in Pool Calculator: pool-calc@foursailsapps.com or support@foursailsapps.com.