We've put a lot of effort in helping you adding a new invoice within seconds. The whole interface is custom design — even the date and time picker.
In order to store a receipt only four values are necessary — and you can even leave out the date and the time, if you want Refill to interpret it as »now«.
Finally, save your invoice as a full or partial fillup. The rest is being calculated by Refill.
In addition, if you find yourself in low light conditions Refill offers an in-app-torch (for devices with LED-light on the back).
And for a quick undo, simply shake your device to clear all text fields.
Please note: Fuel consumption and CO2-emissions are only calculated from full to full refills.