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Know what runs out first.

Build a 3, 7, or 14-day supply plan. Print a backup for when your phone is dead.

Your supply baseline

Enter what you have on hand. We’ll show what to add.

Water

days covered
gal target
gal to add

Food

days covered
meals target
meals to add

Water baseline: 1 US gallon per person per day. Meals use a planning count of 3 per person per day, not a nutrition assessment. Count only usable, unexpired stock. Add separate supplies for pets and extra needs for heat, health, age, and diet. These numbers are not a survival forecast.

Water guidance: CDC emergency water supply · reviewed September 14, 2026.

Your inputs stay in this page. Save an offline copy to keep your numbers; they are not synced with the iPhone app. Share that file only if you want to share those counts.

Run a 30-minute blackout drill.

Practice now, while you can still fix what’s missing.

1

Switch to airplane mode

After downloading your app and plan, turn off Wi-Fi and cellular data on the test phone. Keep another way to call for help. Leave medical equipment and utilities on.

2

Find your plan and supplies

Open a free guide offline. Find your water, light, paper map, and rally-point card. Can another household member find them too?

3

Write down what failed

List what was missing or hard to find. Restore connectivity. Choose one fix, give it a date, and repeat the drill after fixing it.