sarancode-bits/itantra ? reverse-engineered prompt

Build me an Android app called iTantra that works like an offline peer to peer walkie talkie for emergency situations.

It should let two nearby phones connect over a local hotspot or Wi Fi without any internet, discover each other automatically, and then send short voice messages by turning speech into text on the sending phone and turning that text back into speech on the receiving phone. Make the app work in a simple, reliable way with a dark high contrast emergency style interface, a clear mic button, a host and scan and pair flow, connection status, and a way to send SOS style alerts that play loudly and vibrate even if the phone is silent.

If the real speech and voice models are not available, the app should still run in a mock mode so I can test it easily. Use current docs online if you need to, and make sure it feels polished, fast, and ready to demo on Android.