Set your car's fuel once (unleaded 91, premium 95 or 98, E10, diesel, LPG or electric) and Wayaroo shows the cheapest station for it within the distance you choose (from 0.5 km to 1,000 km), the average price across the area, and how far the cheapest one is.
It also does the sum most apps leave to you: is the drive worth it? Wayaroo takes the saving on a 40-litre fill, subtracts the fuel you'd burn getting there and back in your own car, and tells you plainly: "worth the drive, about $3.10 ahead", or "closer is cheaper overall".

Petrol prices in Australian cities move in a cycle: they jump, then drift down over a few weeks. Wayaroo keeps a daily median price for your area and compares today with the last six weeks, so the fuel card says one of: good time to fill up (near the recent low), prices just went up, buy only what you need, coming down, wait a few days if you can, or in the middle of the usual range. No forecasts, just where today sits.
Plan a trip and Wayaroo shows what it will cost in fuel for your car, using the local average price, next to the public transport fare, so you can compare the two honestly.
Prices can change during the day and can be wrong; the board at the station is what you pay. Details on the data credits page.