Cheapest fuel, every time.
Just ask Penny.
Penny is your fuel-savvy gran on WhatsApp. Send her a text or a voice note and she'll tell you where the cheapest pump is nearby, then send you straight there. No app to download, no hunting about.
- £3.99 a month in the UK
- $4.99 in the US
- Cancel anytime
1. Asda – 186.7p · 1.2 mi
2. Jet – 188.9p · 2.0 mi
3. Esso – 191.9p · 2.4 mi
💰 #1 saves you £2.60 on a 50L fill. Every penny counts!
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Drive safely 💛
“I've been watching pump prices so you don't have to, love. Just ask me, and I'll always point you to the cheapest one nearby.”— Penny x
Three messages to a cheaper tank
No forms, no apps, no fuss. Penny lives in the WhatsApp you already use.
Ask her anything
Type it or send a voice note: diesel, unleaded, near you or in another town.
“Cheapest unleaded near me, Penny?”She checks every pump
Penny looks at live prices around you and sends the five cheapest, with how far each one is and what you'll save.
“Here's the cheapest near you, my dear.”Off you go
Pick one and Penny sends a map link that opens turn-by-turn directions in a tap.
“Drive safely, love 💛”Pumps a few streets apart can differ by pennies a litre
Real prices Penny found on 13 November 2026. Same fuel, same neighbourhood, very different bill.
Prices change through the day, so always check the pump. Savings compare Penny's cheapest pick with the priciest station in the same search.
Thoughtful, the way a good gran is
She talks back
Send a voice note and Penny answers out loud, so your eyes stay on the road.
One tap for location
She asks for your location with a single button and searches exactly where you are.
Remembers your fuel
Tell her once that your car's diesel and she won't ask again.
UK and US
Pence per litre at home, dollars per gallon across the pond. Postcodes and ZIP codes both welcome.
Every UK forecourt
Penny reads the government's Fuel Finder, covering over 8,000 UK stations, and refreshes it every few minutes.
Safety first
Short answers and one-tap directions. Penny always says: only use your phone when it's safe.
One cheaper fill-up can cover the month
One plan, everything included. In Birmingham, a single cheaper fill on 13 November saved more than a month of PennyFill. Cancel whenever you like, no questions asked, dear.
- Ask as often as you like, by text or voice
- Spoken replies while you're on the move
- One-tap directions to any station
- Unleaded, premium, diesel (and midgrade in the US)
- Cancel anytime from your account
Ask away, dear
Who is Penny?
Penny is PennyFill's assistant: a friendly AI with the warmth of your favourite gran. She reads your texts and voice notes, finds the cheapest fuel near you and sends you on your way. She's an AI, so do double-check the price at the pump.
Do I need to download anything?
No. Penny lives in WhatsApp. Sign up here, save her number, and say hello.
Where do the prices come from?
In the UK, from the government's official Fuel Finder service, which every forecourt must report to within 30 minutes of a price change. Penny refreshes it every few minutes. In the US, from Google Maps. Spotted a wrong UK price? Report it to Fuel Finder.
Can I use Penny while driving?
Please don't type while driving. If you must ask on the move, send a voice note: Penny answers out loud and sends one-tap directions. Better still, ask before you set off.
How do I cancel?
Log in, open your account and click “Manage subscription”. It takes two clicks.
Is my location stored?
Only your most recent search location, so “near me” works next time. It's never sold or shared for advertising.
Never pay a penny more than you need to.
Penny's ready when you are, love.