PrepFree tools, no sign-up
How many days would your household last?
Calculators and checklists for food, water and power cuts, with the right advice for where you live. Independent, sourced and free.
The app: Prep for iPhone
The tools give you a number today. Prep keeps it right as you use things. It's free to download, with Premium for bigger households and longer goals.
Days of food and water
Worked out from each person's and pet's needs, so you can see what's limiting you.
Scan what you buy
Barcode lookup fills in the name, brand and calories, where the product is known.
Use it before it expires
A use-first list, expiry reminders and a 12-month timeline.
Kits and checklists
Grab bag, car, first aid and home lists. Tick off what's packed.
Private by design
No account and no ads. Your data stays on your devices and in your own iCloud.
On your wrist and Home Screen
Widgets, Siri and an Apple Watch app.
Common questions
Are the tools really free?
Yes. No account, no email, no affiliate links. They run in your browser and send nothing to us.
Do I need the app to use the tools?
No. The tools work on their own. The app is for keeping the numbers up to date once you've got started.
Is this official advice?
No. We link to government and Red Cross guidance and show where each figure comes from, but this is an independent site.
Why are there UK and US versions?
The advice differs. The UK talks about 3 litres of drinking water and 8°C in a power cut, while US guidance talks about a gallon of water and 40°F. So each country gets its own version.