OSHI: Offline Messenger

OSHI: Offline Messenger

Private chat · no internet

2 ratings
1 review
Free

Details

  • Released
  • Updated

Features

Background Location Access

OSHI: Offline Messenger video #1 for iPhone
OSHI: Offline Messenger screenshot #2 for iPhone
OSHI: Offline Messenger screenshot #3 for iPhone
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OSHI: Offline Messenger screenshot #5 for iPhone
OSHI: Offline Messenger screenshot #6 for iPhone
OSHI: Offline Messenger screenshot #7 for iPhone
OSHI: Offline Messenger screenshot #8 for iPhone
OSHI: Offline Messenger screenshot #9 for iPhone
OSHI: Offline Messenger screenshot #10 for iPhone
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About

This app enables private chat and calls without an internet connection, using Bluetooth and Wi-Fi mesh technology. It allows users to communicate and share content even in areas with no signal, with end-to-end encryption for one-to-one conversations.

Works offline via Bluetooth/Wi-Fi mesh
End-to-end encrypted one-to-one chats and calls
No phone number or SIM required
On-device AI assistant
Voice and video calls
Group chats and media sharing
Self-destructing media
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What's New in OSHI

1.0.43

September 7, 2026

Fixed a freeze that could force-close the app while a message arrived, and two crashes at the start and end of calls. Long conversations now open much faster.

More

Events

Read more about Blackout Ready

Blackout Ready

Stay in touch when networks go down

Jul 15, 2026 Jul 29, 2026

Read more about Signal-Free Festival

Signal-Free Festival

Stay with your crew when there's no signal

Jul 12, 2026 Jul 26, 2026

Read more about Your Keys, Your Messages

Your Keys, Your Messages

A privacy reset: see how OSHI keeps every message end-to-end encrypted.

Jul 8, 2026 Jul 22, 2026

User reviews

Audio doesn’t work

Tried video call and the audio was very weak and eventually just stopped with weird noises (but still low volume).

Response from developer

Hi OOC17, Apologies for the inconvenience. We’re going to review the issue and do our best to fix it as quickly as possible. We’re currently working on LoRa message transmission for the next update, and we hope to have your video issue fixed in the same update as well. Thank you for your patience and for reporting this to us. Best, Hugo - OSHI Team

Developer apps

FAQ

How does OSHI work without internet?

OSHI utilizes a Bluetooth and Wi-Fi mesh network to connect devices directly. Messages can hop from phone to phone, extending the range even without a cellular or Wi-Fi internet connection. This allows for communication with people nearby.

What is the range of the OSHI offline mesh?

The offline mesh has a short range, typically around 100 meters in open spaces and less through walls, provided both phones have OSHI open. The range can extend further if other nearby users also have OSHI open to relay messages.

Is my communication secure with OSHI?

One-to-one chats and calls are end-to-end encrypted using X3DH and Double Ratchet protocols, meaning only you and the recipient can read your messages. Your encryption keys remain on your device.

Can I make calls with OSHI?

Yes, OSHI supports both voice and video calls. These calls are also end-to-end encrypted for private one-to-one conversations.

Does OSHI require a phone number or email?

No, OSHI does not require a phone number, SIM card, or email address to use. It is designed for private communication without needing personal identification.

What kind of content can I share with OSHI?

You can share voice notes, photos, files, and live location through OSHI. It also features self-destructing 'view once' media for added privacy.

What is the on-device AI assistant in OSHI?

OSHI includes an AI assistant that runs entirely on your iPhone. Your prompts and its responses stay on your device, ensuring privacy, though its responses should be fact-checked.

What devices does OSHI support?

OSHI is available on Mac, Apple Watch, iPhone, and iPad, allowing for cross-platform communication and usage.