diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..6fc1bf9
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 rrbe
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
index 575eff8..e153bb3 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,11 @@
-# LocalShare (LAN file sharing)
+# LocalShare — share Mac files, scan a QR code to view or save them in your phone's browser
 
 [简体中文](README_CN.md) | English
 
-A small macOS tool that spins up a static file server so you can share specific files/folders from your Mac with other devices on the same local network.
+A small macOS app that moves files and text between your Mac and other devices (phone, tablet…) over WiFi — the other end just uses a browser, with no client to install.
+
+- Pick a file or folder, scan the QR code that appears (or just open the link), and browse the files in your phone's browser (HTML, PDF, Markdown, images…)
+- Two-way text transfer — type some text and share it via a QR code, or send text back from the phone to the Mac
 
 <table>
   <tr>
@@ -14,31 +17,28 @@ A small macOS tool that spins up a static file server so you can share specific
 
 ## Features
 
-- Share via QR code — scan with the Camera app to open in a browser
-- Share multiple files / folders at once
-- Serves HTML / PDF / video / images; previews Markdown / JSON / CSV right in the browser
-- Optional guest upload (read-only by default) — send photos and documents from your phone back to the Mac
-- Shows who's currently viewing (device name when it can be resolved, otherwise the IP)
-- Optional "visible on current network only" — open on the current Wi-Fi only, unreachable from other networks the Mac is connected to
-- Automatic updates (prompts when a new version is found; installs only after you confirm)
+- Share files and text by QR code, or just by opening the link
+- Serves HTML / PDF / video / images; previews Markdown / JSON / CSV
+- After you share, the other end can send files and text back
+- Shows who's currently viewing
 - `localshare` command line: bring up the window to share, or `--headless` to print the link and QR code in the terminal
 
 ## Why this app exists
 
-- iPhone Safari can't open local HTML files directly — they need to be served from a static file server to preview
-- When you don't want to actually move files to your phone via AirDrop/LocalSend, you just want to preview them there
-- When you want to browse several files at once
-- To share files with other people on the same LAN
+- When AirDrop is flaky, or the other device isn't an Apple device
+- iPhone Safari can't open local HTML files directly, so previewing the web pages you vibe-coded is awkward
+- No need to spin up `python3 -m http.server`
+- No need to install a client like LocalSend
+- Preview only — no need to actually save files onto the phone
+- Quickly pass text around, without relying on flaky Handoff
 
-## Usage
+## GUI usage
 
-1. Open the app and drag files onto the window, or click "Choose Files or Folders".
-2. Connect your phone to **the same Wi-Fi as the Mac**, then scan the QR code in the window with the Camera app.
-3. If macOS shows a firewall prompt on first launch, click "Allow".
+Scan the QR code, or open the LAN address directly. If macOS shows a firewall prompt on first launch, click "Allow".
 
 The QR code points to something like `http://192.168.x.x:8080/?t=<random-token>`: the link carries a one-time token, so whoever scans it gets in seamlessly, while anyone who only knows the IP:port cannot access it.
 
-> ⚠️ Traffic is plain HTTP (unencrypted). That's fine on trusted networks like home or office; but on public Wi-Fi such as cafés or airports, others on the same network may be able to see what's transferred — don't share sensitive files there. When needed, turn on "visible on current network only" in the window to narrow the exposure.
+> ⚠️ Traffic is plain HTTP (unencrypted). Best avoided on public networks like airports and cafés.
 
 ## Terminal usage
 
@@ -65,6 +65,10 @@ The app is ad-hoc signed, so **opening** it may be blocked by Gatekeeper (warnin
 xattr -dr com.apple.quarantine /Applications/LocalShare.app
 ```
 
+## License
+
+MIT — see [LICENSE](LICENSE).
+
 ## Credits
 
 This project was inspired by:
diff --git a/README_CN.md b/README_CN.md
index ce5f3de..a8f886e 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -1,8 +1,11 @@
-# LocalShare（局域网文件分享）
+# LocalShare —— 共享 Mac 文件，扫码在手机浏览器里查看/保存
 
 简体中文 | [English](README.md)
 
-一个 macOS 小工具，启动一个静态文件托管服务，分享你电脑上的特定文件/文件夹，在同一个局域网下的其他设备中访问。
+一个 macOS 小工具，在本机和手机等设备之间通过 WiFi 互通文件和文本，对端使用浏览器，无须安装客户端。
+
+- 选中文件或文件夹，相机扫描出现的二维码，或直接打开链接，在手机浏览器里浏览这些文件（HTML、PDF、Markdown、图片……）
+- 支持双向传送文本，编辑文字通过二维码分享后传输，并可从手机端发送文本回 Mac
 
 <table>
   <tr>
@@ -14,31 +17,28 @@
 
 ## 功能
 
-- 二维码分享，相机 app 扫一下浏览器中打开
-- 一次分享多个文件 / 文件夹
-- 支持 HTML / PDF / 视频 / 图片，Markdown / JSON / CSV 在浏览器里直接预览
-- 可选开启访客上传（默认只读），手机里的照片、文档能传回电脑
-- 显示当前在线访客（能反查到就显示设备名，否则显示 IP 尾号）
-- 可选「仅当前网络可见」：只在当前 WiFi 开放，电脑连着的其它网络访问不到
-- 自动更新（发现新版会提示，确认后再装）
-- 命令行 localshare：唤起窗口分享，或 --headless 在终端显示链接和二维码
+- 二维码分享或直接打开链接分享文件、文本
+- 支持 HTML / PDF / 视频 / 图片，Markdown / JSON / CSV 预览
+- 支持分享后，由对端反向传输文件、文本
+- 显示当前在线访客
+- 命令行 `localshare` 命令：唤起窗口分享，或 `--headless` 在终端显示链接和二维码
 
 ## 为什么有这个 app
 
-- iPhone 不支持 html 文件直接在手机 Safari 中打开，需要托管到静态文件服务器才能预览
-- 如果你并不想把文件通过 AirDrop/LocalSend 传到手机，只是想在手机预览
-- 想同时浏览多个文件
-- 分享文件给局域网内的其他人使用
+- 避免 AirDrop 的不稳定，或对端并非苹果设备
+- iPhone 不支持 html 文件直接在手机 Safari 中打开，不便预览你 Vibe Coding 的网页
+- 不需要配置 python 启动 `python3 -m http.server`
+- 不需要安装 LocalSend 等客户端
+- 可以只预览，不需要传递文件到手机存储
+- 快速传递文本，避免 handoff 不稳定
 
-## 使用
+## GUI 使用
 
-1. 打开 app，拖拽文件到 app 窗口，或手动点「选择文件夹/单个文件」。
-2. 手机连上**与电脑相同的 WiFi**，用相机扫描窗口里的二维码。
-3. 首次启动若系统弹出防火墙提示，点「允许」。
+扫描二维码或通过局域网连接地址打开，首次启动若系统弹出防火墙提示，点「允许」。
 
 二维码地址形如 `http://192.168.x.x:8080/?t=随机令牌`：链接里带一次性令牌，扫码者无感进入，单纯知道 IP:端口 的人无法访问。
 
-> ⚠️ 传输是明文 HTTP（没有加密）。在家里 / 公司这种可信网络下没问题；但在咖啡馆、机场等公共 WiFi 下，同一网络的人有可能看到传输内容——别在这种网络分享敏感文件。需要时可在窗口里开「仅当前网络可见」收窄暴露面。
+> ⚠️ 传输是明文 HTTP（没有加密）。机场咖啡厅等公共网络下最好不要使用。
 
 ## 终端用法
 
@@ -65,6 +65,10 @@ ad-hoc 签名，**打开**可能被 Gatekeeper 拦截（提示「已损坏」或
 xattr -dr com.apple.quarantine /Applications/LocalShare.app
 ```
 
+## 协议
+
+MIT —— 见 [LICENSE](LICENSE)。
+
 ## 参考项目
 
 本项目受到如下项目的启发