Privacy policy

Last updated: 13 November 2026

PennyFill ("we", "us") is a WhatsApp assistant that finds the cheapest fuel near you. This policy explains what we collect, why, and the choices you have. We keep it short because we collect as little as we can.

What we collect

  • Account details: your name, email address, WhatsApp phone number and a securely hashed password.
  • Your fuel preference, such as diesel or unleaded.
  • Location: when you share your location or name a place, we use it to find nearby stations. We keep only your most recent location and when you shared it, so we can tell whether it's still current.
  • Your last search results, so you can pick a station by number.
  • Messages and voice notes you send to PennyFill. These are processed to answer you and are not stored after the reply is sent, apart from normal server logs kept for troubleshooting.
  • Subscription status from our payment provider. We never see or store your full card details.

How we use it

Only to run PennyFill: to recognise you on WhatsApp, find fuel prices near you, send you directions, and manage your subscription. We don't sell your data, use it for advertising, or send you marketing messages.

Who we share it with

We use these services to run PennyFill. Each receives only what it needs:

  • Meta (WhatsApp): delivers messages between you and PennyFill.
  • Stripe: takes payments and manages subscriptions.
  • Anthropic (Claude): understands the text of your messages.
  • OpenAI: turns your voice notes into text, and Penny's spoken replies into speech.
  • UK Fuel Finder (GOV.UK): we download UK fuel prices from it. We don't send it anything about you.
  • postcodes.io and OpenStreetMap: turn a town or postcode you type into map coordinates.
  • Google Maps: outside the UK, we send Google the location you share or name so it can find fuel stations and prices near you. In the UK we don't. Directions links open in Google Maps.

How long we keep it

Account details are kept while you have an account. Your latest location and search are replaced each time you search. When you delete your account, we delete your data from PennyFill straight away.

Deleting your data

Log in, open your account and click Delete my account. This cancels any subscription and permanently removes your account, location and search history from PennyFill. You can also stop using PennyFill at any time by simply not messaging it.

Your rights

Under UK data protection law you can ask to see, correct or delete your data, or object to how we use it. You can do most of this from your account page. You can also complain to the Information Commissioner's Office (ico.org.uk).

Changes

If we change this policy we'll update the date above.