The app that works when nothing else does.
Every app on your phone will still open when the towers go down. This is the one that will still matter. Everything your family needs to know, stop-the-bleed to seed-saving, four levels deep, searchable in the dark. A compass that knows north when GPS doesn't. A map that finds your people without a tower. No signal. No internet. Ever.
No install, nothing to download. Sign in with Google or Apple and 911 Responder is yours, free, forever. The Membership keeps it on your phone for good and adds the rest. Early access opens to the list first.
- High and tight, 2 to 3 in above the wound. Not on a joint.
- Pull the strap tight. Twist the rod until bleeding stops.
- Lock the rod. Note the time on the strap or forehead.
- Still bleeding? Second tourniquet directly above the first.
- Do not loosen. Get to care.
The first hour, free, in your browser.
911 Responder is the free half of Alphatac: everything a first responder needs in the first hour, open in any phone's browser with nothing to install. Sign in once and it is yours, forever. Bleeding, not breathing, burned, poisoned, lost, fire, flood, the power went out. A real Call 911 button leads every screen, because when the towers are up that is still the right first move.
Three taps from a dark screen to the right card.
A tree of situations, not topics, ending on a card a person who has never opened the app can follow: the tourniquet, the airway, the burn, the poisoning. A timer runs. The next step is one tap away.
From the thirty-second card to the source it came from.
Every page shows where it came from: the TCCC guidelines, the CDC, the Army manual, its date, what we checked. Read the card, or read the whole procedure, or read the source text itself.
North, sunrise, a grid reference, a dose.
A compass that knows north when GPS doesn't, sun and moon times, MGRS from your position, the medical and water calculators, and a printable deck for the go-bag. One state map, downloaded once and kept.
911 Responder is in early access. It opens to the list first, then to everyone, free, with one sign-in. The Medic 1 path, printing and the offline map of one state are part of it.
A box for the house. A radio for each of you. A stick for the go-bag.
The app works on any smartphone. The compatible devices create mesh connectivity if the internet or communications go out: a Vault server that needs no internet, a family map that needs no tower, and a copy of everything that needs no phone. Nothing to configure.
One box. Five jobs. No internet, ever.
- Vault serverBroadcasts its own Wi-Fi and serves the entire Vault to any phone, tablet or laptop that joins. Nothing to install. Twenty people, one copy.
- Family mapEvery Beacon and every phone in the group, with position, last seen and battery. I'm OK, Rally and Help work for anyone on its Wi-Fi.
- Message storeHolds messages for anyone out of range and delivers them when they are back. Sealed on the sender's phone; the Node never reads them.
- Mesh nodeA LoRa radio inside. A full node on your family's mesh, relaying for the Beacons and bridging phones on Wi-Fi onto the radio network.
- TAK serverThe operator in the family connects ATAK, iTAK or WinTAK by scanning one code and sees the same people on their own map.
A pocket radio for each of you.
GPS built in, days on a charge, keyed to your family before it ships. Beacons relay for each other, so ten of them in a valley extend each other's reach with no setup. A Beacon reports its position even when no phone is near it.
Coverage for a property or a valley.
A weatherproof repeater on a small solar panel, already joined to your group. The only instruction is "put this box somewhere high," and the app's signal meter says better or worse as you walk.
The whole Vault on a stick.
A rugged 512 GB drive with the Vault and the complete Archive, a one-click server for any laptop, a reader that needs no install at all, a Faraday sleeve, and a printed card deck. The go-bag item, and the gift.
Built for the night you actually need it.
Alphatac opens to what is happening to you, not a table of contents. Three taps from a dark screen to the right card, with a timer running and the steps read aloud if your hands are busy.
Two taps to the tourniquet card.
NOW mode is a tree of situations, not topics. Bleeding, not breathing, burned, poisoned, lost, fire, flood, the power went out. Each branch ends on a card a person who has never opened the app can follow, with the timer already running.
Half a mile east, three minutes ago.
The family map shows everyone in your group with no tower and no internet, over pocket radios you never have to configure. Tap a name and a big arrow points at them.
The plan you made on a Sunday.
Ten minutes with the Plan tool and your household has a water number, a medication list, a rally point and a list of what to do first. On the bad day, it is already there.
A field manual, a compass, a map, and a family, in one app.
A compass that knows where north is, even when GPS doesn't.
True heading with declination corrected on the device. Your position in lat-long, MGRS and UTM, one tap to send it. Waypoints, breadcrumbs, and a big arrow back to the rally point. Sunrise, sunset, moon and tides computed on the phone.
- GPS-denied mode: when the satellites go quiet or lie, the compass says so and switches to dead reckoning.
- Blackout mode: red screen, minimum brightness, no sounds, battery stretched.
DECL +3.1° E · ALT 1,214 ft
SUNSET 19:42 · MOON waxing 62%
Find each other without a tower.
Group is Find My plus a family group text, not a tactical console. A people list first, the map second. One button says I'm OK. One says Rally. One says Help, and it goes to the people in your group who can. Every message is sealed on your phone before it touches a radio.
- Runs over pocket LoRa radios and the Alphatac Node, with no network of any kind.
- The operator in the family sees the same people in ATAK. No second map, no second radio.
Twelve pillars. Four levels deep. Searchable in the dark.
Medical and trauma, water, food, shelter, power, communications, security, navigation, tools and repair, safe chemistry, rebuilding a community, and the reference shelf underneath it all. Every subject runs from a thirty-second card to the textbook it came from, and you choose the level.
- Instant, typo-tolerant search across the whole Vault, entirely on the phone.
- Every page shows its source, the source's date, what was checked, and who reviewed it.
- Anything on screen prints to a card, a sheet, or a binder.
- Article
- Apply a limb tourniquet · L1 procedure
- Source
- CoTCCC Guidelines, Jan 2024, para 3.a · public domain
- Anchor
- tccc-2024.pdf, page 12 (open in the Vault)
- Checks
- schema · anchors · values · units · contradictions · currency
- Verified
- compared to source by a person, Aug 2026
- Reviewed
- K. R., paramedic (NRP), for revision 3
- Note
- Informational use. Not a substitute for care.
Plug in. Charge. Install. Scan. Done.
The Node and four Beacons, already talking to each other before the box is opened. No settings, no firmware, no channel keys. Six steps, four of them tapping OK, and the family is on the map.
- Plug in the Node. It broadcasts its own Wi-Fi and serves the whole Vault to any phone on it.
- Charge the Beacons. Days on a charge, GPS built in, already paired to the kit.
- Install the app, scan the kit card, scan your Beacon. The map shows the family.
You won't open it most days. Good.
A gym membership is a promise you make to yourself about who you are, and most days you don't go. Alphatac is the same kind of promise, with one difference: on the day you need it, it is the only thing in your pocket that still works. So the membership does its job quietly. Your plan shows how complete it is. A seasonal checklist arrives. A ten-minute drill shows up once a month. New content lands. And the map works the night it has to.
The first hour is free. The rest is one membership.
911 Responder is the free app: every first responder card and source, NOW, the compass, the medical calculators, an offline map of one state, free forever with one sign-in. The Membership is everything past the first hour: the rest of the Vault, the shared plan, the family map, every map region and every content drop. Founding members keep the founding price.
911 Responder
All first responder content, NOW, the compass and an offline map of one state. Opens in the browser, nothing to install.
About 911 ResponderMembership
Everything past the first hour, and the Vault kept on your phone where nothing can evict it. Downloaded packs stay readable if you leave.
DetailsAnnual
For the household that has decided. Included with the Family Kit.
DetailsLifetime
For people who don't do subscriptions. Every future content drop included.
Details