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.
Live now · Start free in minutes
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
Log every supply once. Mainstay keeps the count and condition straight, then flags what to rotate or restock before a date lapses — not after.
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.
Let Mainstay watch
It tracks every expiration and restock point, and reads the risks where you live, so nothing slips quietly out of date.
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.
Sam Wills has one rule: ready should feel calm.
Sam is Mainstay's preparedness guide — the steady voice behind every checklist, prompt, and field guide in the app. He has spent years on the unglamorous part of being ready: knowing exactly what you have, what is about to expire, and what genuinely matters next.
Mainstay is that experience, turned into a tool. No fear, no doomsday theater — a clear, working system for a household that would rather be prepared than worried.
“If your plan only lives in your head, you don't have a plan yet.” Sam Wills · MainstayMore about Sam
Start free. Stay ready for the price of a coffee.
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
- Every free Mainstay field guide
- Weekly Field Notes newsletter
Pro Membership
Stay ready.
or $89/year — two months free
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 & score
- Document vault for critical papers
- Household sharing for the whole family
Lifetime
Own it for good.
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Pay once. Every Pro feature, every future update, no subscription.
- Everything in Pro Membership
- One payment — no recurring bill
- All future updates included
- Founding-member badge
Founding pricing through Sept 30, 2026 — or the first 250 households, whichever comes first.
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. Practical preparedness, delivered calm.