Comparison

ApiCatcher vs Rulify

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ApiCatcher

This tool captures and debugs HTTP/HTTPS traffic on your mobile device. It allows you to modify, resend, and analyze requests, generate API documentation, and apply custom rules for flexible customization. All data is stored locally for privacy.

Highlights
  • Capture HTTP/HTTPS traffic
  • Modify and resend requests
  • Generate API documentation
  • Rewrite and script rules
  • Export traffic as HAR files
  • API scanning and statistics
Features
Read full description

ApiCatcher is a user-friendly mobile HTTP/HTTPS/WS/WSS packet capture and debugging tool. ApiCatcher also offers macOS and Windows versions (ApiCatcher Desktop), and the ApiCatcher can sync captured traffic to ApiCatcher Desktop in real time. [Key Features] • Traffic Capture: Capture HTTP, HTTPS, WS, and WSS traffic (WS: WebSocket; WSS: WebSocket over TLS). • Data Manipulation: Copy, export, encrypt, and decrypt Query Params, Headers, and Bodies. • Host Filtering: Configure blacklists and whitelists to filter captured hosts. • Request Replay: Modify and resend requests. • Combo Replay: Schedule and execute multiple requests sequentially based on dependencies, with support for dynamic parameter injection. • Scheduled Replay: Automate and trigger request replays at set intervals. • Auto-Generated API Docs: Automatically generate API documentation and export directly to Postman or Apifox. • Rewrite Rules: Mock responses, redirect requests, modify requests/responses, or drop requests/responses. • Scripting Engine: Extend capabilities with script plugins to flexibly modify requests and responses on the fly. • History Export: Batch export captured traffic as HAR files. • API Scanner: Run rule-based vulnerability/error detection and statistics on captured traffic, with support for custom scanning rules. • Media Export: Batch export images and videos, with automatic merging for segmented download requests. • Real-Time Sync: Stream captured HTTP/HTTPS traffic instantly to ApiCatcher Desktop for advanced analysis and debugging. It also supports syncing to Burp Suite, which requires installing the plugin provided by ApiCatcher on Burp Suite. • DNS mapping/spoofing: Bypass DNS resolution by sending requests for specified domain names to a designated IP address, achieving an effect similar to editing the hosts file on a computer. • Support decoding request/response bodies encoded with the Protobuf protocol, such as gRPC requests. If a .desc descriptor file is provided, field names can also be decoded. [Personalization Settings] • Configurable code highlighting styles with multiple built-in themes, supporting JSON/XML/HTML/JS. • AI assistant mode available: directly capture and analyze packets through AI dialogue. [How It Works] ApiCatcher establishes a local VPN connection on your device to route all network traffic through a local Man-in-the-Middle (MITM) service. As long as the VPN is active, ApiCatcher can capture any HTTP/HTTPS/WS/WSS traffic passing through Wi-Fi or cellular data. [Data Privacy & Security] ApiCatcher's root certificate is a self-signed certificate generated entirely on your own device. All captured HTTP/HTTPS/WS/WSS data is stored locally on your device and is never uploaded to any remote servers. [Description of automatic subscription service] 1.Subscription service: a) Pro Monthly (1 month) b) Pro Yearly (12 months) c) Ultimate Monthly (1 month) d) Ultimate Yearly (12 months) 2.Payment: After the user confirms the purchase and makes payment, it will be credited to the iTunes account 3.Automatic renewal: Apple iTunes account will be charged within 24 hours before the expiration date, and the subscription period will be extended by one subscription period after the successful deduction 4.Close the service: You can close the service by going to "Settings" on your iPhone, entering "iTunes Store and App Store", clicking on "Apple ID", selecting "View Apple ID", entering the "Account Settings" page, clicking on "Subscriptions", and managing automatic subscription services. If you need to cancel, you can close it 24 hours before the end of each billing cycle, and no further charges will be deducted within 24 hours before the expiration date 5.Service Agreement: https://apicatcher.net/en/terms-of-service 6.Privacy Agreement: https://apicatcher.net/en/privacy-policy

About

Rulify

Features
Read full description

Rulify 帮助你阅读 iOS App 隐私报告,了解报告中记录的 App 联网域名,并整理成可导出的个人网络规则。 导入与查看 • 从文件或系统分享菜单导入 .ndjson App 隐私报告。 • 在设备上解析网络活动记录,按 App 查看域名、访问次数与时间信息。 • 支持根域名分组、排序和搜索,便于整理多个子域名。 生成与导出 • 生成 DOMAIN、DOMAIN-SUFFIX 规则,并可按需要开启 IPv4、IPv6 规则生成。 • 选择参与生成的 App,调整过滤条件,预览与编辑规则内容。 • 支持 Surge、Clash / Mihomo、Loon、Quantumult X、Shadowrocket 规则格式。 • 复制或导出单个 App 的规则,或将多个 App 的规则打包导出为 ZIP。 可选 GitHub 功能 配置自己的 GitHub 仓库与 Personal Access Token 后,可上传生成的规则、查看远程规则文件并复制链接。也可在设置中开启导入后或生成后的自动上传。Token 保存在设备的系统钥匙串中。 数据与使用说明 报告解析、规则生成和本地导出无需注册 Rulify 账号。App 可能向 Apple 查询报告中 Bundle ID 对应的公开 App 名称与图标;配置 GitHub 后,相关网络请求发往 GitHub。隐私报告原文不会上传到 Rulify 开发者服务器。 Rulify 处理用户主动导入的系统报告,本身不提供 VPN、流量拦截或实时网络监测。生成的文件需由相应软件使用;第三方软件及服务由各自提供者运营。

Screenshots

ApiCatcher4 screens
Rulify3 screens

Verdict

The call

The clearest difference is in-app purchases: Rulify at none against ApiCatcher's 4. Rulify also leads on chart position (#191 vs unranked). ApiCatcher's advantage is update cadence (every 5 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ApiCatcher sells 4 in-app purchases, starting at $9.99 per month. Rulify asks for nothing beyond the download.

UpkeepUpdate frequency

ApiCatcher ships an update every 5 days, Rulify every 2 months. Both last shipped on October 14, 2026.

Scorecard3 real differences · 8 level
ApiCatcher versus Rulify: the parameters behind the verdict, then further details
ParameterApiCatcherRulify
PriceFreeFree
Rating4.8 (8 ratings) — better—
Positive reviews93.3% of reviews—
Number of ratings8 — better—
Update frequencyEvery 5 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank—#191 — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size65 MB3 MB
Age rating4+4+
DeveloperNanning Signalling Network Technology Co., Ltd一萱 樊

In-app purchases

4 purchases

ApiCatcher

Subscriptions2
  • Ultimate$9.991 Month
  • Ultimate$39.991 Year
One-time2
  • Lifetime Pro$39.99
  • Lifetime Ultimate$89.99
None

Rulify

No in-app purchases

Questions

Is ApiCatcher free?
ApiCatcher is free to download, with in-app purchases available.
Is Rulify free?
Rulify is free to download, with no in-app purchases.
Do ApiCatcher or Rulify have ads?
Neither ApiCatcher nor Rulify shows ads.
Which is updated more often, ApiCatcher or Rulify?
ApiCatcher ships an update every 5 days, and Rulify every 2 months. Most recently, ApiCatcher was updated on October 14, 2026 and Rulify on October 14, 2026.

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