# Loon

> Network debugging and optimization tool with extensive protocol support and traffic analysis. (iPhone/iPad app by Loon Lab Limited.)

- Source: https://appshunter.io/ios/app/loon/id1373567447 (this page in markdown: same URL + `.md`)
- Developer: [Loon Lab Limited](https://appshunter.io/developer/1631584654)
- Category: Utilities, Developer Tools
- Price: $7.99
- Rating: 3.90/5 from 504 App Store ratings · 234 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 63 MB
- Languages: American English, Russian, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2018-05-09
- Data updated: 2026-09-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/loon/id1373567447/reviews.md

## What is Loon?

Loon is not just another network tool—it's a powerhouse for debugging and optimizing your network connections. With Loon, you're in command, equipped with an array of features to streamline your network troubleshooting experience. Here's what sets Loon apart:

Protocol Support: Loon supports a wide range of protocols including ss, ssr, vmess, trojan, vless, HTTP/S, SOCKS5, hysteria2,Shadow-TLS, and WireGuard. No matter your preferred protocol, Loon has you covered.

Comprehensive Traffic Capture: Capture all HTTP, HTTPS, TCP, and UDP traffic on your device effortlessly and redirect it to your proxy server for thorough analysis and debugging.

Detailed Record-Keeping: Gain insights into your network activity with Loon's ability to record HTTP and HTTPS request and response headers and bodies. With this level of detail, troubleshooting becomes a breeze.

MITM Capabilities: Loon offers Man-in-the-Middle (MITM) functionality over HTTP2 connections, allowing you to intercept and analyze encrypted traffic for deeper debugging insights.

Advanced Routing Options: Take control of your network traffic with Loon's powerful router, which can be configured based on domain, URL, IP, Protocol, Port, and HTTP headers. This granular control ensures that your traffic flows exactly where you need it to go.

Robust Ad-blocking: Loon's ad-blocking capabilities are second to none. Develop custom rules, rewriting, and scripting to effectively block unwanted ads and streamline your browsing experience.

Traffic Usage Monitoring: Stay informed about your data usage with Loon's built-in traffic measurement tools, giving you valuable insights into your network activity.

Cutting-edge DNS Features: Loon boasts full IPv6 support, asynchronous DNS requests, and the ability to query DNS over HTTPS, QUIC, and HTTP3. Record DNS results and ensure a seamless DNS resolution experience.

Extendable Functionality: Unlock limitless possibilities with Loon's support for using JavaScripts to extend proxy functionality. Customize and tailor Loon to meet your specific needs and preferences.

Experience the next level of network debugging with Loon. Download now and take control of your network connections like never before.

For more about proxy:
https://nsloon.app/docs/intro

Join our telegram group:
https://t.me/Loon0x00

Contact us
loon0x00@gmail.com

## Key features

- Wide protocol support (ss, vmess, trojan, etc.)
- Comprehensive traffic capture (HTTP, HTTPS, TCP, UDP)
- Detailed request/response header and body recording
- MITM functionality over HTTP2
- Advanced domain-based routing
- Robust ad-blocking with custom rules
- Traffic usage monitoring
- Advanced DNS features (IPv6, DoH, DoQ, DoH3)

## Chart rankings

- #26 in Top Paid · Utilities (US App Store)

## What do users think of Loon?

Overall sentiment: neutral

**Pros**

- 👍 Good for ad blocking
- 🚀 Faster than Quantumult X
- 🔒 Secure and reliable
- 👍 Simple and user-friendly
- 👍 Frequent updates
- 👍 Responsive developer

**Cons**

- 🐛 Unstable connection
- 🐛 Frequent crashes
- 🔋 High battery consumption
- 🤔 Limited protocol support
- 💸 Expensive compared to alternatives
- 🤔 Confusing configuration
- 🤔 Poor documentation
- 🤔 Restrictive device limit

**Commonly reported bugs**

- Nodes not working after iOS 16 update
- Subscription issues and inability to refund
- Mitm and script features not functioning properly
- Incompatibility with certain games and apps

**Most requested features**

- Support for Reality protocol
- Support for gRPC protocol
- Proxy sharing feature
- Improved DNS hijacking protection
- Better widget and shortcut support
- macOS and Windows versions

## Recent user reviews (10 of 234)

All indexed reviews: https://appshunter.io/ios/app/loon/id1373567447/reviews.md

### 3/5 — UI不太美观

*2026-08-07, version 3.5.0*

希望美化一下ui

### 4/5 — 希望增加DNS分流。

*2026-07-28, version 3.5.0*

另外，在 Wi-Fi 与蜂窝网络之间切换后，所有节点都会显示 Failed，必须重启才能恢复正常。不确定是否是已知问题，希望后续能够修复。

### 1/5 — 买后遇到问题，进入群组被秒封

*2026-06-15, version 3.4.0*

本来想问一问问题，什么都没做，没说，刚进入电报群组就被封？

### 5/5 — 规则没配置好时国内应用有些会比较卡

*2026-05-27, version 3.4.0*

规则没配置好时国内应用有些会比较卡，这软件上手有门槛。

### 1/5 — 配置文件不生效

*2026-05-07, version 3.3.9*

设置了分流还直连

### 1/5 — 垃圾软件

*2026-05-03, version 3.3.9*

买了之后进tg群，直接给我封禁拉黑了，怎么都进不去

### 5/5 — loon奇怪现象

*2026-05-02, version 3.3.9*

手机正常，但配置带anytls就无法上传至appletv。

### 1/5 — 去年9月购买的，进群就被封禁了，一直到现在，希望作者看到予以解封。

*2026-04-25, version 3.3.9*

如标题所言，进群学习如何操作，就被踢了。

### 5/5 — 能不能在首页加个更新订阅的按钮，节点经常挂

*2026-04-17, version 3.3.9*

rt

### 1/5 — 投诉

*2026-04-06, version 3.3.9*

进群下载个配置，就T我出群，有这样对待消费者的吗？

## Frequently asked questions about Loon

### What does Loon do?

Loon is a comprehensive network tool designed for debugging and optimizing network connections. It allows users to capture and analyze network traffic, manage proxies, block ads, and gain insights into network activity.

### What are the key features of Loon?

Key features include support for a wide range of protocols (ss, vmess, trojan, etc.), comprehensive traffic capture, detailed record-keeping of requests and responses, MITM capabilities, advanced routing options, robust ad-blocking, traffic usage monitoring, and advanced DNS features.

### Is Loon free to use?

Based on the provided information, Loon is available for free. There are no mentions of subscription fees, in-app purchases, or ad-supported models.

### What kind of network traffic can Loon capture?

Loon can capture all HTTP, HTTPS, TCP, and UDP traffic on your device. This captured traffic can then be redirected to a proxy server for thorough analysis and debugging.

### How can Loon help with network troubleshooting?

Loon aids in network troubleshooting by providing detailed insights into network activity, including recording HTTP and HTTPS request/response headers and bodies. Its advanced routing and MITM capabilities also allow for deeper inspection and manipulation of traffic.

## Version history (last 5 releases)

### 3.5.0 — 2026-06-25

This release introduces a major overhaul of the UDP networking stack and substantial improvements to QUIC, WireGuard, and related protocols, delivering better performance, lower memory usage, and improved stability.

UDP & QUIC

* Rebuilt the UDP stack to improve small-packet forwarding performance, thread scheduling, and memory efficiency.
* Added dynamic timeout management for bursty short-lived UDP connections to reduce resource consumption and prevent excessive memory usage.
* Reworked the QUIC implementation with significant improvements in performance, stability, and memory utilization.
* Optimized QUIC-based protocols including Hysteria2, DoQ, and DoH3 for better throughput and reliability.
* Added Port Hopping and Proxy Chain support for Hysteria2.
* Reworked the WireGuard implementation with major improvements in performance, stability, and memory efficiency.
* Improved UDP protocol resilience during network transitions and under unstable network conditions.
* Enhanced QUIC detection and fallback handling.

TCP & Protocol Enhancements

* Optimized the TCP stack for improved scalability and concurrency.
* Added Reality support for VMess, Trojan, and AnyTLS.
* Added TLS fingerprint options.
* Added Obfuscation (Obfs) support for Shadowsocks 2022.

Other Improvements

* Packet Capture now supports HAR export and cURL generation for individual requests.
* Fixed several HTTP/2 to HTTP/1.1 compatibility issues.
* Refined request record categories and improved list presentation.
* Fixed multiple crashes and included various performance improvements and bug fixes.

### 3.4.0 — 2026-05-25

- Added support for custom ports in DNS mapping servers
- Optimized AnyTLS memory usage and overall stability

### 3.3.9 — 2026-03-31

- Added support for AnyTLS protocol
- Fixed issues with protocol forwarding

### 3.3.8 — 2026-02-14

- Multi-Config Support: You can now easily switch between different configurations and subscribe to remote config files.
- HTTP/2 Refactor: Major overhaul of the HTTP/2 proxy engine with optimized workflows and more accurate stream state management.
- Performance & Fixes: General performance optimizations and bug fixes for a smoother experience.

### 3.3.7 — 2025-12-15

- Plugins now support configuration of DoH / DoQ / DoH3
- Added shortcut commands for several frequently used actions to improve efficiency
- Bug fixes and performance improvements

## Apps similar to Loon

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [V2Box - V2ray Client](https://appshunter.io/ios/app/v2box-v2ray-client/id6446814690) | 4.7 (97,688) | Free | Utilities |
| [LeapVPN - Best Private Proxy](https://appshunter.io/ios/app/leapvpn-best-private-proxy/id1590740244) | 4.7 (4,346) | Free | Utilities |
| [Quantumult X](https://appshunter.io/ios/app/quantumult-x/id1443988620) | 3.8 (1,642) | $9.99 | Utilities |
| [Fair VPN](https://appshunter.io/ios/app/fair-vpn/id1533873488) | 4.2 (1,387) | Free | Utilities |
| [ServerBox](https://appshunter.io/ios/app/serverbox/id1586449703) | 4.9 (90) | Free | Utilities |
| [熊猫吃短信2 - 垃圾短信拦截](https://appshunter.io/ios/app/2/id1642682818) | 4.6 (236) | Free | Utilities |

## More apps by Loon Lab Limited

- [MiniMind](https://appshunter.io/ios/app/minimind/id1475347685)
- [Loon Lite](https://appshunter.io/ios/app/loon-lite/id6444029612)

All apps by Loon Lab Limited: https://appshunter.io/developer/1631584654

## Related topics

[loon](https://appshunter.io/ios/topics/loon)

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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 2026-09-05.*