Track expiration dates, manage emergency supplies, and calculate how long your stock will last — all offline, all on your device.
7-day free trial — then €2.99 once, yours forever
No ads — not now, not ever.
HAPT — the Happy Apocalypse Preparation Tool — helps you prepare for emergencies by keeping track of your essential supplies — water, food, medicine, equipment, and important documents. Know exactly what you have, where it is, and when it expires.
Everything runs locally on your Android device. No account needed, no cloud dependency, no internet required. Your data stays yours. And you can share with your peers with no additional costs.
Everything you need to manage your emergency preparedness stock and information in one app.
Monthly calendar view shows expiring items with coloured badges. Tap any day to see what's due. The monthly strip shows how many items expire each month.
Track Water, Food, Medicine, Equipment, Energy, Documents, and more. Each category has specific fields tailored to what you need to track.
Scan food barcodes to automatically pull product info from OpenFoodFacts — name, brand, Nutri-Score, nutrition data, and ingredients.
Filterable list of all items with expiry status badges (green/orange/red/grey). View photos, details, and manage everything from one screen.
Special water items track tank ID, litres, rotation schedules, and location. Generate QR labels to attach directly to containers for instant identification.
Consolidated view of all items — total count, breakdowns by category and location, food tag cloud, and a full expiry timeline sorted by month.
Each category surfaces the fields that matter — dates, photos, weight, doses, voltage, file attachments, and more. No clutter, just what each item type needs.
Organize supplies by storage area. Create named locations, add photos, and generate QR labels for easy identification.
Generate printable QR labels for water containers and locations. Various sizes, portrait/landscape, 600 DPI export for label printers.
Category-specific preparation advice built in. Learn best practices for water storage, food rotation, medicine kits, and more.
Calculate how long your stock lasts for a given number of people, or see what you need to reach your target. Supports normal and emergency consumption rates.
Every feature works without internet. No account, no cloud, no tracking. Your data lives on your device — private, fast, and always available.
HAPT registers as a receiver for ZIP backups and documents. Share a backup ZIP from any file manager or another app — HAPT catches it and restores or attaches it automatically.
Export your entire database to a ZIP file for backup. Restore on the same device or transfer to another — paths are rewritten automatically.
Each item category has specific fields to track what's important.
Try HAPT free for 7 days — no payment needed. If it fits your life, unlock it forever for a single one-time purchase. No subscriptions, no recurring charges.
No ads — not now, not ever. The purchase is how HAPT is funded. That's it.
New features under development. Not yet available
New features under development. Not yet available
All purchases managed by Google Play. Prices may vary slightly by region.
Under the hood — the architecture that makes HAPT work offline.
hapt://item/{id} — Open itemhapt://loc/{id} — Open location