How Radisize handles your data
Radisize is a standalone utility app that helps users estimate radiator output for rooms and properties.
Radisize does not collect, store or transmit any personal data that can identify you. All properties, rooms and calculation inputs you create are stored locally on your device and are not sent to any server controlled by us. For in-app purchases, RevenueCat processes transactions and uses an anonymous app identifier to validate and restore purchases. We only receive your Pro entitlement status.
Radisize does not use third-party analytics, advertising SDKs or tracking technologies. We use RevenueCat only to manage in-app purchases.
When you purchase or restore Pro, RevenueCat processes the transaction and uses an anonymous app-specific identifier to associate the purchase with your app installation. Purchase history data is used for app functionality (receipt validation and restore) and analytics (subscription status in our RevenueCat dashboard). This data is not linked to your identity and is not used to track you across apps. No device identifiers or advertising identifiers are collected.
Because all data is kept on your device, we do not share your room or property data with any third party. For purchases, limited information is shared with RevenueCat (such as the anonymous identifier and purchase status) to validate transactions and enable restore. If you choose to export or share a PDF report, that file is created on your device and shared only using the iOS system share sheet under your control.
Radisize is not directed at children and does not collect any personal information from children.
Because we do not collect or store personal data on our servers, there is no personal information for us to access, modify or delete. If you wish to remove your data from the app, you can delete the app from your device, which removes all stored properties and rooms.
If you have any questions about this privacy policy or the app, you can contact us at:
We may update this privacy policy from time to time. Any changes will be posted on this page with an updated “Last updated” date.
Last updated: 23 March 2026