Prepared,
not worried.
Mainstay tracks your supplies, watches every expiration date, reads the risks where you live, and walks you through a plan that actually moves. Calm and capable — never alarmist.
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Most preparedness fails quietly. A flashlight with dead batteries. Water that expired two winters ago. A plan nobody quite remembers. Not from lack of care — from lack of a system.
Mainstay is that system. It keeps the details straight so being ready stops being a project and starts being a habit.
Not sure where you stand? Take the 2-minute checkFour jobs, handled — so you don't have to hold it all in your head.
Supply inventory & alerts
Add what you have — scan, type, or from a checklist — then just confirm changes as they come. Mainstay keeps the counts and dates straight and flags what to rotate or restock before it lapses.
Local threat intelligence
Weather, seasonal, and regional risks for your exact location, turned into a short, specific list of what to check this week.
Guided readiness plan
One focused step at a time — water, then power, then documents — with a readiness score that climbs as your household gets genuinely ready.
Document vault & household
Insurance, medical, and ID documents kept safe and reachable, shared across everyone in the household so no one is locked out.
From scattered supplies to a steady habit.
Take stock
Add what you already own — scan it, type it, or start from a Mainstay checklist. Fifteen minutes, done.
Keep it current
Add items by scan or by hand and confirm what changes. Mainstay keeps every date and next check in one place and surfaces what's coming up — so it stays off your mind, not on your to-do list.
Follow the plan
A guided path moves you forward one clear step at a time. Your readiness score shows exactly where you stand.
Every supply and every date, turned into something you can read at a glance.
Mainstay weighs what you have, what is still current, and what you have worked through — into one honest number.
- Item
- Bottled water
- Category
- Water
- On hand
- 24 units
- Restock at
- 6 units
- Expires
- Mar 2027
- Location
- Garage — shelf B
Log it once. Mainstay watches the date and the count, and tells you before either runs short.
Being ready is a quiet rhythm, not a project.
Most weeks are quiet. When something needs a look, Mainstay says so — plainly, once. Here's a typical week.
Stored water is about a gallon short — a nudge to top it up.
Furnace season is close: a reminder to test the CO detector.
Next in your plan: a flashlight everyone can find in the dark.
The weekly rhythm — the proactive nudges, the local seasonal check, and the guided plan — comes with Pro. The free Field Kit keeps your inventory, the expiration list, and your readiness score.
See a full week with Mainstay
Sam Wills has one rule: ready should feel calm.
Sam is Mainstay's guide — a friendly character, not a real person — and the steady voice behind every checklist, prompt, and field guide in the app. His job is to make the next step clear and calm.
No fear, no doomsday theater — a clear, working system for a household that would rather be prepared than worried. The facts come from named, dated sources and a real editor; Sam carries the tone.
“If your plan only lives in your head, you don't have a plan yet.” Sam Wills · MainstayMore about Sam
Field Skills — the other half of being ready.
Supplies run out; know-how doesn't. Field Skills are short, sourced lessons for the practical parts of keeping a household ready — each one quotes a named authority, with the date it was checked, and prints on one page for when the power is out.
Pro · sourced + printable
Where to put a generator when the power goes out
Most advice stops at the purchase. The decision that matters is where you set it down — and the carbon-monoxide risk if you get it wrong.
Drawn from CPSC and CDC guidance, each point cited with the date it was checked.
One kit, shared with the people in it.
Invite up to four people so everyone sees the same inventory, dates, and plan — no one locked out when it matters.
Pro · owner + up to 4
Put Mainstay on your phone.
Open it in your browser and add it to your home screen — no app store. Your loaded inventory, plan, and score stay readable with no signal, and edits you make offline sync when you are back on. (Uploads need a connection.)
Start free. Stay ready for $8.95 a month.
Start free and upgrade when you're ready — including a one-time Lifetime membership for households done with subscriptions.
Field Kit
Get organized.
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Everything you need to start tracking what you already have on hand.
- Supply inventory — up to 25 items
- Expiration list view
- Household Readiness score & history
- Every free Mainstay field guide
- Weekly Field Notes newsletter
Pro Membership
Stay ready.
or $89/year — save about $18 (17%)
The full membership: alerts, local intelligence, and a plan that keeps moving.
- Unlimited supply inventory
- Expiration & restock alerts
- Local threat & seasonal intelligence
- Guided readiness plan
- Document vault for critical papers
- Household sharing for the whole family
Lifetime
One payment, no subscription.
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Pay once. Every Pro feature, every future update, no recurring bill.
- Everything in Pro Membership
- One payment — no recurring bill
- All future updates included
- Covers your whole household
One payment for your household — every Pro feature and all future updates for as long as Mainstay runs. No subscription; export your data anytime.
Take the paper version too.
Three printable Mainstay field guides — no fluff, no padding. The same thinking the app runs on, ready to put on the fridge today.
Get the field guides- 01
The 72-Hour Prep Checklist
The exact supplies a household needs to be self-sufficient for three days — printable, organized by category, nothing padded.
PDF · 5 pages - 02
The Household Inventory & Expiration Tracker
A printable workbook for logging what you have, how much, and when it expires — the paper version of the Mainstay app.
PDF · 4 pages - 03
Family Emergency Plan Builder
Meeting points, contacts, and roles worked out before you need them — a fill-in plan every member of the family can follow.
PDF · 5 pages
Get Field Notes every week.
One short, practical note each week — what to check, what to rotate, what actually matters. This is our free newsletter for everyone; the personalized weekly digest that watches your own kit comes with Pro.