Igatha

Infrastructure

emergency signaling

SHOW HN2025

Igatha

Offline SOS signaling+recovery app for disasters/wars

github.com

#disaster response#offline sos#ble beacon#rubble rescue

163points
89comments
#429of 3,837 in 2025
Top 12%of 2025 by points

How HN took it

CuriousMostly questions and neutral comments

7 positive, 27 neutral or asking, 1 mixed, 6 critical, out of 41 comments about the project. Thread score +0.06.

Idea: 4 for, 6 againstExecution: 1 for, 0 against

The thread, comment by comment

Each row is a top-level comment and its replies, in HN's order. Select a cell to open that comment on HN.

positive neutral or mixed critical about another commenter or something else the maker

What HN said

What people liked

  • Good idea that makes use of technology for disasters

    From 2 comments
    • This is awesome. Technology put to good use. Can voice be transferred? Message be recorded and rebroadcasted? What about making the device vibrate SOS pulses. The person at stake…
      keyle on HN
    • This is awesome. Technology put to good use. Can voice be transferred? Message be recorded and rebroadcasted? What about making the device vibrate SOS pulses. The person at stake…
      keyle on HN
  • Offline disaster tools are needed, as shown by Hurricane Helene

    From 1 comment
    • This is great. That said, I think that unless Apple and Google install something like this by default, it won’t get much traction, because you can’t download the app when you…
      dimal on HN

Objections

  • BLE signals are weak through rubble; physics limits range

    From 2 comments
    • > It can also be improved; I know BLE is not _that_ effective under rubble. It's a tough problem to solve because you're up against the laws of physics and the very boring (and…
      eddythompson80 on HN
    • Do smart phones support "LE Long Range (Coded PHY, S=8)" Perplexity says it can transmit up to a 1km in ideal conditions. Otherwise it's 10-30m indoor.
      neuroelectron on HN
  • Phones must have the app installed beforehand, so adoption is hard

    From 1 comment
    • This is great. That said, I think that unless Apple and Google install something like this by default, it won’t get much traction, because you can’t download the app when you…
      dimal on HN
  • Background disaster detection could chirp noise unexpectedly

    From 1 comment
    • Okay, what is "disaster detection"? I'd really prefer my phone not chirp noise over Bluetooth channels if I don't notice and respond to a notification in time. Would be nice if…
      daveguy on HN

Requests

  • Vibration or tapping-based signaling

    From 2 comments
    • This is awesome. Technology put to good use. Can voice be transferred? Message be recorded and rebroadcasted? What about making the device vibrate SOS pulses. The person at stake…
      keyle on HN
    • BLE might be useful above ground in some situations, e.g., a person who is unable to stand and is located in a large field of tall grass, or someone who is hiding from an…
      rapjr9 on HN
  • Background listening with notifications

    From 1 comment
    • People, nearby, with the app installed who open it during a disaster. That's why it needs to be in more hands. Ideally, there would be an option to have your phone "listen" in…
      nizarmah on HN
  • Loud sound button with volume control

    From 1 comment
    • It would be nice to have a button to play a loud sound. A common use case is to play it when you are under ruin and you hear rescuers close to you. If the rescuers heard a loud…
      lormayna on HN
  • Embed the feature at OS or hardware level

    From 2 comments
    • this is good but ideally people want this app/platform to be embedded in hardware/OS level
      tonyhart7 on HN
    • This is great. That said, I think that unless Apple and Google install something like this by default, it won’t get much traction, because you can’t download the app when you…
      dimal on HN

Questions

  • Who receives the SOS signal?

    From 1 comment
    • What's not clear to me is, who's listening? Like if I install this app and I get buried under a crumbled building and send out the SOS signal... Are there any receivers???
      weikju on HN
  • Can voice be transferred or rebroadcast?

    From 1 comment
    • This is awesome. Technology put to good use. Can voice be transferred? Message be recorded and rebroadcasted? What about making the device vibrate SOS pulses. The person at stake…
      keyle on HN
  • Does LE Long Range work on smartphones?

    From 1 comment
    • Do smart phones support "LE Long Range (Coded PHY, S=8)" Perplexity says it can transmit up to a 1km in ideal conditions. Otherwise it's 10-30m indoor.
      neuroelectron on HN

Alternatives named

  • Meshtastic and LoRa devices

    From 1 comment
    • This is cool! I have been really enjoying using Meshtastic and LoRa lately. It feels like a blessed relief from the toxic swamp of the regular internet. I love pinging stupid…
      pjs_ on HN
  • Apple Connect to a Satellite and Android satellite emergency services

    From 2 comments
    • This is something I needed to hear for months. Thank you. I'll work towards that. I'll need to figure out how to prove the poc is useful. Apple's "Connect to a Satellite" touches…
      nizarmah on HN
    • Satellite based emergency services are already enabled in recent Android phones. I know that only because recently I have been getting a notification on my Pixel 9 Pro that…
      INTPenis on HN
  • Avalanche beacons

    From 1 comment
    • Check out the tech behind avalanche beacons for some inspiration. They are meant to locate bodies buried deep in snow debris fields within a meter precision. You have to also…
      boc on HN

Category, keywords, summaries and labels on this page were made by AI (Thread Reader v2) and not checked by hand. Each point links to the comments it came from.

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