# LINKCAST - Secret Messenger — Send Files over Encrypted P2P

> Secure, encrypted P2P messenger with live streaming and file sharing. (iPhone/iPad app by BTD STUDIO Co.,ltd..)

- Source: https://appshunter.io/ios/app/linkcast-secret-messenger/id1120573295 (this page in markdown: same URL + `.md`)
- Developer: [BTD STUDIO Co.,ltd.](https://appshunter.io/developer/329323106)
- Category: Social Networking, Utilities
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 11.0 · 153 MB
- Languages: English, Japanese, Chinese, Chinese
- Released: 2016-09-13
- Data updated: 2026-07-07
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/linkcast-secret-messenger/id1120573295/reviews.md

## What is LINKCAST?

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LINKCAST data transfer is very fast because it communicates with the encryption protocol using UDP.  HTTPS access, which is vulnerable to backdoor attacks, is used only for initial login processing. 

In this way the encryption key is changed to a completely new key very frequently, with every individual chat. 
This is how LINKCAST protects user privacy in the most effective way possible.

Encryption uses AES 256 bit for ECDHE and encoding for authentication and HMAC - 512 bit for hash. 
--

- FUN STICKERS!
- Live streaming feed with up to 10 friends with the “Buzz Cast”!
- Completely secure encryption and world-class security; a focus on absolute privacy.
- Easily share any file; transmitted under heavy-encryption.
- Share yourself “here and now” with the easy-to-use live stream feature “Main-Cast”.
- LINKCAST realizes a “No Cloud” messenger via its very own encryption protocol. 
- Group chat with an unlimited number of people simultaneously; create and share public group chat rooms.
- Share your content with real-time video streaming, available to watch for all of your friends.
- High-quality voice call sound, available at extremely low data cost.
- Fun and expressive stickers and emoji. (AR and face-recognition stickers coming soon) 
- Compatible with the new iOS10 feature Callkit, and Siri; using your main iPhone phone screen. 
- Compatible with iMessage App.  Use LinkCast stickers in iMessage free-of-charge. 

【Minimum requirements】
iOS9 or above
※iPhone basic phone screen cannot be used as primary phone screen in iOS9.

## Key features

- Encrypted P2P communication
- Live streaming (Buzz Cast & Main-Cast)
- Unlimited group chats
- Secure file sharing
- High-quality voice calls
- Fun stickers and emoji


## Frequently asked questions about LINKCAST

### What is LINKCAST's primary focus?

LINKCAST prioritizes absolute privacy and security through its unique encryption protocol, enabling a "no cloud" messenger experience. It utilizes AES 256-bit encryption for secure communication.

### How does LINKCAST ensure fast data transfer?

LINKCAST achieves very fast data transfer by communicating with its encryption protocol using UDP. HTTPS access, which is only used for initial login processing, is avoided for regular communication.

### Can I share files with LINKCAST?

Yes, LINKCAST allows you to easily share any file. All transmitted files are protected under heavy encryption, ensuring their security during transfer.

### What are the live streaming features in LINKCAST?

LINKCAST offers two live streaming features: "Buzz Cast" for live streaming with up to 10 friends, and "Main-Cast" for sharing yourself in the "here and now" with an easy-to-use interface.

### Does LINKCAST support group chats?

Yes, LINKCAST supports group chats with an unlimited number of people simultaneously. You can also create and share public group chat rooms.

### What are the minimum requirements for LINKCAST?

LINKCAST requires iOS 9 or above. It is compatible with iPhone, iPad, and iPod devices, and also supports Apple Watch.

### Is LINKCAST available on other platforms besides iOS?

Based on the provided information, LINKCAST is designed for iOS devices including iPhone, iPad, and iPod. Compatibility with other platforms is not specified.

### How often is LINKCAST updated?

The latest version of LINKCAST is 3.1.8, which was last updated on December 28, 2020. This indicates a history of updates, though the frequency is not explicitly stated.

## Version history (last 1 release)

### 3.1.8 — 2020-12-28

・Fixed the problem that the message is rarely displayed in LINKCAST even if the notification of the normal message arrives.

## Apps similar to LINKCAST

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Wink Talk](https://appshunter.io/ios/app/wink-talk/id1416513073) | 3.8 (5) | Free | Social Networking |
| [TLchat1](https://appshunter.io/ios/app/tlchat1/id1492418041) | 4.2 (5) | Free | Social Networking |

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All apps by BTD STUDIO Co.,ltd.: https://appshunter.io/developer/329323106

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-07.*