Offline guidance when there is no signal
ECHO combines immediately available survival guides, private on-device conversations, and offline navigation. Download one verified model, then ask questions without relying on cloud AI.
Free emergency guides · One-time conversational unlock · No subscription
Version 2.1 · August 2026
What’s new in ECHO 2.1
A broader offline safety toolkit, built around immediate guides, one private conversational model, and field navigation.
- Offline navigation
- GPS coordinates and compass
- Altitude, slope, and air-pressure readings
- Worldwide offline reference map
- Trail recording and route retracing
- One ECHO model with automatic old-model replacement
- Emergency guides available before model download
- Expanded safety validation and emergency fallbacks
- Step-by-step interactive checklists
- Voice input and read-aloud responses
- Conversation and PDF sharing
- On-device conversation memory
- Battery, heat, memory, and performance improvements
- Calmer native interface and accessibility improvements
Offline navigation
Navigate without a network
View your coordinates, compass heading, altitude, slope, and air pressure. Record your trail and consult a lightweight worldwide reference map using device sensors and locally stored data.
Sensor availability and accuracy vary by device, conditions, and permission settings. Map data is a lightweight reference, not a substitute for a dedicated topographic map.
Field instruments
Local sensor readouts
Coordinates
GPS position
Heading
Compass direction
Altitude
Device location
Slope
Movement estimate
Air pressure
Supported devices
Trail
Record and retrace
Readouts come from device sensors and locally stored data. Availability and precision depend on the device and surrounding conditions.
Guidance before the model download
ECHO's offline emergency guides are available immediately. Open first aid, lost-person, signaling, shelter, fire, water, and food guidance without waiting for the conversational model.
Highlights
- Emergency guides available before model setup
- Step-by-step interactive checklists
- Expanded safety validation and emergency fallbacks
- Clear SOS pathways for urgent situations
One private conversational model
Download one verified ECHO model from the guided in-app screen. Once it is installed, conversations run on your iPhone using llama.cpp and Metal rather than a cloud inference service.
Highlights
- One verified model instead of device-specific variants
- Automatic replacement of the old model
- Voice input and read-aloud responses
- Conversation and PDF sharing
Designed for difficult conditions
ECHO 2.1 adds calmer native navigation, accessibility improvements, on-device conversation memory, and substantial battery, heat, memory, and performance work for longer field sessions.
Highlights
- Optional remembered details stay on device
- Battery, heat, and memory improvements
- Calmer interface and improved accessibility
- No account and no subscription
Technical specifications.
COMPATIBILITY
- iPhone
- iOS 17 or later
ON-DEVICE ENGINE
- One safety-guarded ECHO model
- llama.cpp and Metal inference
- Guided in-app download and updates
OFFLINE TOOLS
- Emergency guides
- Worldwide reference map
- GPS, compass, altitude, slope, pressure, and trail tools
PRICING & PRIVACY
- Free emergency guides
- One-time conversational unlock
- No subscription
- Conversations stay on device
Questions
Frequently asked questions
Does ECHO work without internet?
Emergency guides and offline navigation are designed for use without a network. After the one-time model download, conversational guidance also runs on your device. Internet access is required to download and update the model.
How many models does ECHO use?
ECHO 2.1 uses one verified conversational model. The guided download flow installs it and automatically replaces an older model when needed.
Is ECHO a subscription?
No. Emergency guides are free, and conversational features use an optional one-time permanent unlock through Apple's In-App Purchase system. There are no recurring payments.
What data leaves my device?
Conversations and optional remembered details remain on your device. Network access is required when you choose to download or update the model, and ordinary delivery or security logs may be processed by the relevant hosting provider. See the Privacy Policy for the complete data flow.
What devices are supported?
The current App Store product supports iPhone running iOS 17 or later.
Can ECHO replace emergency services or professional advice?
No. ECHO provides educational suggestions based on established guidance. Contact local emergency services whenever possible and seek qualified medical or survival professionals.
How ECHO Survival AI was built
Technical notes behind the app.
The product pages show what shipped. These guides and case studies document the architecture patterns, privacy decisions, and SwiftUI implementation details behind apps like ECHO Survival AI.
Important safety information
A support tool, not emergency services
ECHO provides educational suggestions based on established guidance. It does not replace emergency services, professional survival training, or advice from qualified medical professionals. Contact local emergency services whenever possible. Device sensors and map data can be incomplete or inaccurate.
Carry guidance beyond the signal
Get immediate emergency guides, offline navigation, and an optional private conversational model on your iPhone.
Download on the App StoreInternet is required to download or update the conversational model.
Free emergency guides · One-time conversational unlock · No subscription · iOS 17+