WhatCable是一款为macOS用户设计的USB-C诊断应用，能够读取USB-C电缆中e-marker芯片的信息，并详细显示充电功率、传输速度等数据[1]。该工具以易读的格式展示充电瓶颈所在，帮助用户了解其USB-C电缆的实际性能[1]。
该应用提供两个版本供选择[1]。免费版基于MIT许可证开源，无广告无追踪[1]；Pro版本售价£9.99（一次性支付），支持最多2台Mac，解锁包括电缆历史记录、实时功率测量、协议诊断在内的16项高级功能[1]。
WhatCable仅支持搭载Apple Silicon处理器（M1或更新）且运行macOS 14或更新版本的Mac[1]。该应用支持19种语言，包括简体中文、繁体中文、英文、日文、韩文、法文、德文、西班牙文等[1]。
WhatCable is a macOS application designed to provide detailed diagnostics about USB-C cables by reading e-marker chip information and displaying data on charging power and transfer speeds in an accessible format [1]. The tool identifies charging bottlenecks and presents technical specifications in a user-friendly manner [1].
The application is available in two versions: a free, open-source edition distributed under the MIT license with no advertisements or tracking [1], and a Pro version priced at £9.99 as a one-time purchase that supports up to two Mac devices [1]. The Pro version unlocks 16 advanced features including cable history records, real-time power measurement, and protocol diagnostics [1]. WhatCable requires macOS 14 or later running on Apple Silicon processors (M1 or newer) [1] and supports 19 languages: Armenian, Brazilian Portuguese, Dutch, English, French, German, Hindi, Italian, Japanese, Korean, Latvian, Norwegian, Polish, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish, and Ukrainian [1].