Your household data belongs to you

Device-local household data

Wattwise does not require a login. Calculator drafts, regional settings, household details, appliances, bills, scenarios, budgets, and preferences are stored in this browser. They are not uploaded to a Wattwise user profile or synchronized across devices.

Saving, exporting, and deletion

The header confirms when work is saved on this device. Reports offers print/PDF, JSON, CSV, and copy options. Settings can download a complete portable backup or clear Wattwise household, bill, scenario, setting, and draft data from the current browser.

Purpose and sharing

Device-local data is used in the browser to calculate, forecast, reconcile bills, build scenarios, and create user-requested exports. It is not public and is not supplied to advertising adapters.

A share link contains calculation assumptions placed in the URL by the user-facing share action; it does not include the complete household, bills, or other private workspace data.

Cookies, analytics, and advertising

Necessary device storage supports regional settings, local calculations and drafts, household workspaces, exports, and privacy choices. Optional analytics is off by default and no analytics provider is currently enabled in the repository.

Google AdSense is disabled by default. If the owner enables it with valid production identifiers and required consent infrastructure, third-party vendors including Google may use cookies, web beacons, IP addresses, or other identifiers to serve and measure ads, including ads based on a visitor's prior visits to this or other sites. Wattwise does not pass bill amounts, household records, saved appliance inputs, private notes, or local workspace identifiers to the advertising adapter.

Learn more about how Google uses information from sites that use its services. Visitors can manage personalised advertising in Google Ads Settings. See the Cookie policy and Advertising disclosure for Wattwise-specific controls.

Consent and regional choices

Users can accept, reject, manage, and withdraw optional analytics and advertising choices. Global Privacy Control is handled as an opt-out signal in the technical integration. EEA, UK, and Swiss personalised advertising must remain unavailable until the owner configures an appropriate Google-certified consent platform and verifies its signals.

Storage limits and backups

Browser storage can be cleared by browser controls, private-browsing cleanup, device reset, or the Wattwise Settings page. Because there is no user account or cloud recovery, users should download a backup before clearing site data or moving to another device.

Security and retention

Device-local records remain under the browser’s same-origin protections. Wattwise limits advertising to eligible public or house placements and keeps it out of bill, settings, report, and other sensitive data-entry surfaces.

International processing and contact

Cloud hosting, monitoring, analytics, consent, or advertising providers may process technical request or consent data in other countries when the deployment owner enables them. The owner must document the selected providers, locations, safeguards, retention schedule, and applicable user rights before launch.

Use the Contact page for privacy requests. This policy describes the present technical design and requires professional legal review for the owner’s jurisdictions, organisation, and provider contracts.