Privacy policy

Last updated: 27 October 2026

Who is responsible and what this covers

EV Calculated is operated by Lewis Houghton, the individual developer of EV Calculated, who is responsible for the personal information described here (the data controller). Contact help@evcalculated.com for privacy questions or requests.

This policy covers evcalculated.com, its home-screen web app and the installed EV Calculated app. Maps and Charger Alerts apply to the installed app, not the website calculator. The Android app is distributed through Google Play. iOS is being prepared and is not currently distributed; references to iPhone explain the intended platform differences.

Your calculator and saved information

Vehicle choices and names, battery levels, charging times, electricity prices, efficiency, charging losses, comparisons and appearance/unit preferences are processed on your device. Saved estimates include the inputs, results and saved date. Vehicle searches use the catalogue included with the app, rather than sending your search to a vehicle-data service.

The website uses browser local storage and caches files for offline use. The installed app uses private app storage for cars, settings, saved estimates, favourite chargers, access credentials and a local copy of Alerts information. These records do not synchronise between devices. Android backup and device transfer are disabled for the current app; an iPhone's device backup settings may include app data in an Apple device backup.

We use device storage to provide the choices, saved records and offline features you request, not to track you for advertising. The calculator has no advertising or behavioural analytics code. Online providers still process technical information to deliver and protect their services.

Maps, searches and location

The installed charger finder uses Google Maps. When location permission is available, it can use your foreground location when you open the finder or choose the location control. You can decline permission and search by town/postcode instead. We do not request background location tracking.

Map display sends the viewed area and technical connection information to Google. Nearby searches send selected coordinates, search radius and relevant filters to our Cloudflare service. Town/postcode searches pass through that service to Google Geocoding. We do not save those search coordinates or search text in our application database. This does not mean that network providers process no request information.

A saved Near home point is different: if you enable this optional Alerts feature, the point you choose, reference charger and matching preferences are stored on our service until you remove them or your Alerts setup expires. It does not continuously track your phone. Public charger information comes from participating networks and data suppliers; it is not a record of your charging sessions.

Optional Charger Alerts and notifications

Setting up Alerts creates an installation record without requiring an account or your name. Our Cloudflare service stores an installation identifier, a hash of its access credential, selected charger watches and charging/payment options, alert preferences, optional home point and reference charger, device time zone and quiet hours, activity timestamps, and update/read/delivery records. These identifiers distinguish installations and are not treated as anonymous information.

If you enable phone notifications, we also store your device platform and an encrypted push registration token. Google Firebase Cloud Messaging processes installation identifiers, tokens and message information to deliver notifications; iPhone delivery also uses Apple's push service. Messages can contain a charger name and update details. The generic-notification option reduces detail in the displayed message. Your phone's lock-screen settings also affect who can see it.

You can use Updates without phone notifications. Turning off notifications in EV Calculated removes the service's push endpoint and stops requested pushes; it does not delete your watches or inbox. Turning off a phone permission alone does not immediately erase remote records. Stop individual watches, turn off Near home, or use Settings → Charger Alerts notifications → Delete alert setup while online to remove the whole setup.

Hosting, access and service providers

Cloudflare provides website hosting, APIs and databases. It processes request and connection information such as IP address, requested resource, device/browser information and time to deliver and secure the service. The app automatically creates a random access credential on your device. Our service stores its hash, creation/activity and expiry dates, revocation state and request counts to protect access and limit costs. For automatic setup, we process your connection IP address and retain a daily hashed identifier for rate limiting; we do not store the raw address in our application database. Legacy tester-code records may also remain.

Google provides Maps, Geocoding and Firebase Cloud Messaging. Zoho Mail handles support email. Apple provides iPhone push delivery and any device backup you choose when an iOS version is available. Store operators handle downloads and testing under their own terms. We use providers for the functions described here, rather than selling them your data for advertising.

Further information: Cloudflare privacy, Google privacy, Firebase privacy and security, Zoho privacy and Apple privacy.

Help, email and sharing

Help searches and editable email drafts stay on the page and are not sent to our server or saved by Help. Opening an email draft does not send it. If you send an email, we receive your email address, message and any attachments you choose to include, and use them to respond and investigate. Please remove unnecessary personal, payment and location details from screenshots. We do not use support messages for advertising.

The general Share control shares the app link and description. Charger/location sharing includes the selected public charger details and link. Your chosen email, sharing, navigation or charging-provider app handles what you send under its own policy. EV Calculated does not collect your card details or take payment for a charging session. We may disclose information where required by law or necessary to establish or defend a legal claim.

Why we use personal information

We rely on legitimate interests to operate and secure EV Calculated, provide the searches and optional Alerts you request, prevent misuse, troubleshoot faults and answer support messages. We limit this processing to what is needed for those purposes and consider its effect on your privacy. You can object to processing based on legitimate interests.

Location and notification permissions give you control over those device features; they are separate from our legal basis for processing. You can revoke them in your device settings. Providing an Alerts setup, home point or support message is optional: declining it means that particular feature or response is unavailable, but you can still use the calculator. We rely on legal obligation where we must handle information to comply with applicable law, including responding to data-protection requests. We do not use your information for decisions with legal or similarly significant effects made solely by automated processing.

How long information is kept

• Local cars, settings, favourites and saves: until you remove them, clear the relevant storage or the device/browser removes them. Up to 50 estimates are retained; saving more replaces older estimates. Removing a car does not remove copies in saved estimates.
• Alerts inbox: entries older than 90 days are removed by scheduled daily cleanup. You can delete them sooner.
• Alerts setup, watches, home point and push endpoint: until you delete them, or scheduled cleanup removes an installation after 180 days without an app refresh. Cleanup is not instantaneous at the time limit.
• Routine support email: deleted within 12 months after the conversation is resolved. Relevant records may be kept longer while needed for an ongoing dispute or legal obligation.
• Access and security records: automatic app-access records expire after 180 days without renewal and are removed by daily cleanup. Daily access counters, including hashed connection identifiers, are kept for up to eight days; monthly counters for up to four months. Revocation records and legacy tester records are reviewed when access ends or an investigation closes. Revoked credentials remain blocked.

Deletion from our live service is distinct from provider backup, security and delivery retention. Providers may retain limited copies for recovery, security or legal requirements under their applicable terms; the periods depend on the service and record. Contact us for information about retention relevant to a request. We do not promise immediate erasure from every provider system.

Deleting data and your choices

Remove cars in My EVs, estimates in Saved and favourites in the charger finder. For the website, clearing this site's browser data removes local records and cached files; removing a home-screen shortcut alone may not do so.

For the installed app, delete Alerts while online before clearing device storage or uninstalling. Settings → Clear saved app data first deletes configured remote Alerts data and needs a connection for that step. Android's Clear storage or uninstall removes local data but does not immediately delete the remote setup. On iPhone, deleting the app removes local data; offloading retains it. Device backups are managed separately in your device settings.

We cannot retrieve or remotely delete local-only calculator records. If you have lost access to an installation, email us: we will explain what we can identify and do, without promising to recover local records or locate an unnamed installation. Do not email access codes, secret tokens or passwords.

International processing and protection

Our providers operate internationally, so information may be processed outside the UK, including in Europe, the United States and other countries where they or their subprocessors operate. Applicable safeguards may include UK adequacy regulations or approved contractual safeguards, such as Standard Contractual Clauses with the UK Addendum. Provider arrangements are described in Cloudflare's data processing terms, Firebase's data processing terms and Zoho's UK privacy information. Contact us for details or a copy of safeguards applicable to your information.

Connections to our services use HTTPS, Alerts access requires an installation credential and stored push tokens are encrypted. These measures reduce risk but no system can guarantee absolute security. Protect access to your device and email account.

Your rights and complaints

Depending on the circumstances, you have rights to access, correct or erase personal information, restrict or object to processing, and receive certain information in a portable form. Email help@evcalculated.com. We may ask for proportionate information to verify a request and identify the relevant records. We normally respond within one month, subject to the extensions and exceptions allowed by law.

You can complain to the UK Information Commissioner's Office at ico.org.uk/make-a-complaint. You do not have to contact us first.

Changes to this policy

We will update this notice when our practices change and show the date above. Material changes will be brought to your attention through the website or app as appropriate.

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