How many days could you last?
hardtack doesn't count boxes — it computes your real self-sufficiency. The engine cross-references your stock with your household's needs across three critical axes, then derives an overall score.
Liters in stock ÷ daily need × household members.
Food energy intake measured against the rations needed.
Chronic treatments and first-aid kit tracked by dosage.
+ household profiles · adults / children / pets, personalized needs.
The gauge fills from red to green as your reserves grow.
Everything you need to manage a serious stockpile.
Inventory
Add, edit and delete items — quantity, unit, cost, notes. 11 categories and multiple storage locations (pantry, garage, vehicle, cellar…).
Scan & lookup
UPC / EAN / QR barcode scanning. Cascading lookup Open Food Facts → USDA → UPCitemdb → manual entry, with popular products pre-loaded offline.
Expiry & alerts
Multi-batch expiry dates — several batches per item. Min / max restocking thresholds and local notifications 30, 15, 7 and 1 days ahead.
Self-sufficiency score
Multi-axis engine: days of water, calories and medication, aggregated into an overall score. Household profiles with personalized needs.
Kits
8 preset templates (72-hour bag, vehicle, earthquake, blackout, EDC, infant, pets, first-aid) with visual completion progress as a percentage.
Rotation & consumption
First-in-first-out “use first” view to avoid waste. Consumption mode: stock is decremented automatically when you scan an item out.
Budget
Total stock value in real time. Optional monthly budget with a per-category breakdown to steer your purchases.
Data & backup
CSV / JSON export at any time. Local file backup and restore — your data stays on your device, under your control.
Offline, everywhere
Offline-first: every core feature works in the cellar, up a mountain or during a network outage. Available in French, English, German and Spanish.
Seven screens, in the order you'll meet them.
How many days would you last?
The engine cross-checks your stock against your household's real needs on three axes: water, calories, medication. It returns a number of days and names the limiting factor, the one capping everything else.
Your whole stock, laid flat.
Every item carries its category, its location, its quantity and the days left before expiry. Filter by category, by location, by urgency. Instant search, offline included.
One item, all its batches.
Nutrition values filled in automatically on scan, net weight, Nutri-Score, unit cost. Several batches per item, each with its own expiry date.
The barcode does the work.
EAN-13 viewfinder, cascading lookup through Open Food Facts, then USDA, then UPCitemdb, with popular products preloaded so it keeps working without a network. Manual entry as a fallback, always.
Thirty seconds per item.
Eleven categories, six units, three measurement systems. The restock threshold is set item by item and feeds straight into the shopping list.
Ready in five screens.
Household make-up, storage locations, self-sufficiency target. No account to create, no email address asked. Replayable at any time from settings.
Tuned to your ground.
Three themes: Sand for broad daylight, Field for the night watch, Night-Op in red light to preserve night vision. Three accents, three measurement systems, four languages. Change the theme or the accent below, the screenshot follows.
Night-Op imposes its own red tint: under night lighting, the accent choice does not apply.
Your reserves are nobody's business but yours.
Operational security isn't a paid add-on. hardtack is designed so that nobody — not a server, not a snoop, not us — knows what you store.
Biometric lock
Face ID, Touch ID or a PIN on launch.
Name obfuscation
Hide the real label of your items in one tap.
Decoy mode
A decoy inventory appears under a second code.
Encrypted P2P sharing
Local transfer via encrypted QR, without going through the cloud.
Start from a template, track your completion.
Pay once. Keep it for life.
No subscription, no “premium” tier, no feature behind a paywall. hardtack costs the price of a water jug — and it's yours.
- ✓Every v1.0 feature, no exceptions.
- ✓v1.x updates included.
- ✓4 languages · core features work without a connection.
- ✓Your data stays on your device.