Who is responsible
The controller is Jacob Damböck, MSc, Eybnerstraße 24/30, 3100 St. Pölten, Austria. You can contact us at [email protected]. Further operator information is on the About page.
What this version does
The power calculations run in your browser. We do not upload your device names, usage values or calculation assumptions to a ChooseWatt data server. This version has no user accounts, contact form, analytics, embedded advertising scripts or remotely loaded fonts.
Your browser requests the pages, scripts, styles and bundled font files needed to display the public site through Cloudflare Pages and Cloudflare's content delivery network. These technical hosting requests are separate from your saved device plan: the calculator code does not add your entered device names, consumption values or assumptions to those requests.
What is saved in your browser
ChooseWatt uses local storage to keep your selections when you move between the finder, model profiles and comparison:
- Device plan: the key
choosewatt.plan.v1holds the device names and entered energy, maximum running-power and startup values, planning period, carrying limit and calculation assumptions. It can also hold aninputMarketmarker identifying the US or German electrical market for which you entered or confirmed the plan. - Comparison: the key
choosewatt.compare.v1holds the selected model identifiers separately for the US and Germany.
Your device plan is shared across pages and language versions of this website in the same browser. Changing language also changes the regional catalog. Before a plan from another electrical market can receive a positive model assessment, you must review the devices, plugs, adapters and entered values and confirm electrical compatibility in the finder. The watt and watt-hour values alone do not establish compatibility.
These entries have no automatic expiry. They remain in this browser profile until you delete them here, clear the site's browser data or the browser removes them. They are not an account backup and do not automatically sync across your devices.
If browser storage is unavailable, saving may fail. The calculator can still work with the current page's inputs, but those inputs may not carry over to another page.
External links and affiliate links
Manufacturer and documentation links take you to external websites. Those services handle your visit under their own privacy policies.
The US version includes labelled Amazon affiliate links where a matching listing is available. These links send a fixed affiliate identifier to Amazon to attribute a possible qualifying purchase. Your device names, consumption figures, electrical-market marker and calculation assumptions are not included in these links. After you follow a link, Amazon processes your visit under its own privacy notice, including any cookies used on its website.
Our commercial disclosure explains how paid links are labelled and how a commission may arise.
If you contact us
If you send an email, your email service and the receiving email service process the message. Your address and the information you include are used to respond to your enquiry. Email is separate from the calculator; a saved device plan is not attached automatically.
For general questions, feedback and corrections, the legal basis is Article 6(1)(f) GDPR: our legitimate interest in answering enquiries and maintaining accurate guidance. If your enquiry concerns entering into or performing a contract with us, the necessary processing is based on Article 6(1)(b) GDPR. A possible purchase from Amazon is a contract with that seller, not with ChooseWatt.
Correspondence is retained for as long as needed to handle the enquiry and necessary follow-up. Once that purpose ends, it is deleted unless a legal retention duty or the necessary establishment, exercise or defence of legal claims requires further retention. Any such retention is limited to the relevant purpose; statutory duties are based on Article 6(1)(c) GDPR and the protection of legal claims on Article 6(1)(f) GDPR. There is no statutory obligation to email us, but we need a return address and enough information to answer.
Hosting and technical request data
The public website uses Cloudflare Pages and Cloudflare's content delivery network, provided by Cloudflare, Inc., 101 Townsend Street, San Francisco, CA 94107, USA. When you access the site, Cloudflare processes technical data such as your IP address, traffic routing information and information about requests to deliver and protect the website.
Our use of these hosting services is based on Article 6(1)(f) GDPR. Our legitimate interest is the reliable, secure delivery of this website and protection against misuse. The technical request data is necessary to deliver pages to your browser. Your saved calculator inputs remain in this browser's local storage; hosting does not create a server-side copy of your device plan.
Cloudflare operates internationally, so technical data may also be processed outside the European Economic Area, including in the United States. Its privacy notice describes reliance on its EU–US Data Privacy Framework certification for covered US transfers, on the basis of the European Commission's adequacy decision under Article 45 GDPR. Its Data Processing Addendum, section 6 describes standard contractual clauses under Article 46 GDPR for restricted transfers and makes the safeguards available.
Hosting-data retention depends on the delivery and security purpose, the nature of the data and applicable legal requirements. Cloudflare explains these criteria in section 11 of its privacy notice; there is no single fixed retention period for every type of technical request data.
If analytics, forms or additional data processing are added, this notice and the relevant controls must be updated to match that implementation.
Your data-protection rights
Subject to the conditions in the GDPR, you have rights of access, rectification, erasure, restriction of processing and data portability. Where processing is based on Article 6(1)(f) GDPR, you may object on grounds relating to your particular situation. Contact [email protected] to exercise these rights. The local-data button above removes the plan stored in this browser; it does not delete email correspondence.
You may also lodge a complaint with a supervisory authority, in particular in the EU country where you habitually live, work or consider an infringement to have occurred. In Austria, this is the Österreichische Datenschutzbehörde, Barichgasse 40–42, 1030 Vienna, Austria; email: [email protected]. You do not have to contact us first.