with Marichu

I don’t do panic. I do prep.

The free survival guide that works offline: 2-minute lessons, a 2-tap Panic mode and checked hotlines.

Coming soon to Google Play and the App Store

by DBL Nexus

Real screens from the current build.

Most safety guides get downloaded, then deleted

Most free safety guides are long, dry and forgotten until the day they’re needed. By then there’s no signal and no time to read.

iSurvive is the survival app you actually keep. Bite-size cards, missions and quizzes make preparing a habit, and Marichu, your sarcastic, ultimately very supportive guide, makes sure it sticks.

“Ten minutes today. Then you’re the one who knows what to do.”

Marichu

Five tabs. One job: be ready.

Learn, My Plan, SOS, Marichu and Certificates. Real screens from the current build.

Learn

Lessons with a sense of humor

Two-minute lessons and Do-or-Don’t quizzes, with Marichu’s verdict on every answer.

Do or Don’t quiz, Size the go-bag for 3 days: answer Do it is marked correct, and Marichu says: Yes. That’s a skill now, not trivia. Wear it like good jewelry.

Lesson complete with a perfect score: Congratulations! Well done. Knowing what to do is how calm starts.

My Plan

Kit math, done for you

A 3-day go-bag for four: 48 liters of water, 12 person-days of food.

Kit builder for a 3-day go-bag with 4 people: 48 liters of water, about 4 liters per person and per pet per day, and 12 person-days of non-perishable food

Real-world mission, Pack a manual can opener and a hand-crank radio, asking when and where you will do it: tonight, tomorrow or this weekend

SOS

Help in two taps

Tap what’s happening for calm steps. Hotlines are checked against official sources.

Hotlines for the Philippines, last verified 2026-11-01: emergency number 911 with a Verified badge, a Call button and the official sources it was checked against

Marichu

Answers with zero signal

Ask about a hazard, your kit or your plan. She answers only from verified cards.

Marichu offline chat: she answers only from verified cards, with suggested questions like A typhoon is coming, what do I do? and How do I prepare for an earthquake?

Certificates

Certificates for every topic

A certificate for every topic you finish, to keep the habit going.

Certificates tab: next badge Bronze for Go-bag and home kit, 1 of 2 lessons, and the Bronze, Silver, Gold and Platinum tiers

Built to work with zero signal

The details behind the five tabs.

Learn
6 hazard families, 41 topics and over 600 cards, split into Before, During and After. Includes Philippine topics such as PAGASA signals, PHIVOLCS alert levels and evacuation.
Hotlines
38 countries, checked against official directories. Dial by service: police, ambulance, fire or crisis line.
Offline chat
Chat with Marichu in English, Tagalog or Taglish, fully offline. She answers only from the app’s verified cards. Health and medical questions are outside this edition: she points you to your emergency number.
Languages
English and Tagalog. In Tagalog: the app’s menus, the chat and the Panic mode steps. Lessons are in English for now.
Foldables
Two-pane layouts on foldable phones such as the Galaxy Z Fold 8, so lessons and steps sit side by side.

Panic mode

Calm, plain steps in two taps

When an emergency is happening, there is no lesson and no humor. Panic mode gives clear, numbered instructions based on official sources, in English or Tagalog.

Opens in two taps from anywhere in the app.
Shows the right emergency number for your country, with a button to call it.
Works without a data connection.
No ads on SOS, Panic mode, hotlines, crisis lines or the emergency chat.

Panic mode guides

Earthquake
Tsunami
Fire
Gas leak and carbon monoxide
Flood
Typhoon
Tornado
Landslide
Lightning
Radiation
Chemical release
Lockdown
Missing child

Important: iSurvive is educational. It is not a substitute for emergency services or official warnings. In an emergency, always call your local emergency number first.

Your plan stays on your phone

No account
No sign-up and no login. Open the app and start.
Stays on your device
Your progress, plans and certificates are stored only on your phone. No personal data is sent to us.
Delete everything
“Delete all my data” in your Profile erases it all, in one tap.

iSurvive is free and supported by ads from Google AdMob, never on SOS, Panic mode, hotlines, crisis lines or the emergency chat. Read the full Privacy Policy.

For schools, LGUs and teams

The same guide, in a neutral voice

Schools, barangays and LGUs, NGOs and employers can switch Marichu mode off for a neutral, serious voice, with the same content from official sources, the same Panic mode and the same offline access.

Setting: Marichu mode: Off

Get the schools & LGU pack

Content from official sources

Red Cross
Ready.gov (FEMA)
US National Weather Service
CDC
GOV.UK
PAGASA
PHIVOLCS
WHO

iSurvive is an independent app by DBL Nexus. It is not a government app and is not affiliated with or endorsed by any of these organizations.

Designed to make the prep stick

Learning design by Dean B. Lahoz, Founder, DBL Nexus

Dean has spent nearly two decades training and leading frontline teams, a decade of it as a learning and development manager, in the Philippines, the United States, Japan and Australia. iSurvive brings that craft to preparedness: short lessons, hands-on practice and recall checks.

Questions about iSurvive

Is iSurvive free?

Yes. iSurvive is free and supported by ads from Google AdMob, with no in-app purchases. You may sometimes see a full-screen ad after you finish a lesson, and you can choose to watch a short video for bonus XP.

Adults choose personalized or non-personalized ads. Ages 13 to 17 see non-personalized ads only, and under 13 sees no ads. Ads never appear on SOS, Panic mode, hotlines, crisis lines or the emergency chat. You can change your choice anytime in Profile > Ad choices.

Does it work without signal?

Yes. Lessons, Panic mode steps and the chat with Marichu work fully offline. Placing a call to an emergency number still needs your phone’s network.

Where does the content come from?

From public guidance by the Red Cross, Ready.gov (FEMA), the US National Weather Service, CDC, GOV.UK, PAGASA, PHIVOLCS and WHO. Every card shows its source. Hotlines are checked against official directories. iSurvive is an independent app made by DBL Nexus and is not a government app.

Is iSurvive a substitute for emergency services?

No. iSurvive is educational. It is not a substitute for emergency services or official warnings. In an emergency, call your local emergency number first. See our Terms.

Does Marichu joke during an emergency?

No. Marichu’s humor stays in the lessons. Panic mode, hotlines and safety steps use calm, plain language. In chat she recognizes emergency messages and points you to your emergency number and SOS.

Which languages does it support?

English and Tagalog. In Tagalog you get the app’s menus, the chat (Tagalog or Taglish) and the Panic mode steps. Lessons are in English for now.

What data does iSurvive collect?

There is no account. Your progress, plans and certificates stay on your phone and are not sent to DBL Nexus. Ads come from Google AdMob, which receives device information to show ads under the choice you make in Profile > Ad choices; under 13 sees no ads. Details are in the Privacy Policy.

When can I download it?

iSurvive is coming soon to Google Play and the App Store, starting in the Philippines and the United States, then worldwide. Join the waitlist and we’ll email you when it’s ready.

Waitlist

Be ready before you need to be

Get one email when iSurvive launches.