PeekPanda is a mobile app competitor analysis tool that provides data on iOS applications, including paid advertising, App Store search rankings, and viral content. The service maintains a database of more than 1.8 million iOS apps and 4.7 million paid ads. Users can look up any iOS app to view its Meta (Facebook) ad history, including when each ad started, whether it is still live, and how long it has been running. The platform also shows US App Store keyword rankings across 435,000 searches, with Apple's own popularity scores, and can display search results for rival app names. In addition, it catalogs organic slideshows and videos with 10,000 or more views, matched to the apps they discuss. The tool is designed for competitive research and product validation. Typical use cases include identifying which ads competitors keep running over long periods, finding the search terms an app already ranks for, reviewing the format of viral content before building a similar campaign, and assessing market demand for a niche before development. The interface presents data through tiles that show paid ads, US App Store ranks, and ratings, with observation dates attached to each data point. The platform labels revenue and download figures as estimates. PeekPanda can be accessed through a web interface, a REST API, or as a Model Context Protocol (MCP) server. The MCP endpoint is available at https://mcp.peekpanda.com/mcp over HTTP transport with authentication. This integration allows coding agents such as Claude, ChatGPT, Cursor, and Vira to query the same advertising, keyword, and ranking data available through the main interface. Data collection dates for the examples shown on the site range from late 2025 to October 2026.