Alternatives
Products that do what Sentry: Offline Voice SOS for Dumbphones does
Turn spare or dumbphones into 100% offline voice safety tool
- 1OS
A couple of months ago, I built this app to help identify people stuck under rubble. First responders have awesome tools. But in tough situations, even common folks need to help. After what happened in Myanmar, we need something like this that works properly. It has only been tested in controlled environments. It can also be improved; I know BLE is not _that_ effective under rubble. If you have any feedback or can contribute, don't hold back.
2025 · github.com
- 2OV
2022 · a2p.it
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- 6SA
2021 · smsgte.org
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SOS alerts without internet. Privacy-first emergency app.
Jun 2026 · lyfsos.lyfmail.com
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- 14OF
Jul 2026 · offlinetts.com
- 15TT
2022 · deafassistant.com
- 16GY
2015 · haxpax.github.io
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- 23IM
I have a bad memory and can't memorize some important numbers, so I created this project. I've always been concerned about being without my phone (getting robbed - which is common in Brazil - running out of battery, having it break, etc.), so I decided to create a page that sends SMS messages (LLM-summarized) and emails with more detailed information such as geolocation, IP address, and the full message. It’s a simple page that allows sending one or more messages, with recipients being myself and other people - for example, in case I or they need help or need to communicate something…
May 2026 · help.delduca.org
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