Interface to 'Sensor Tower' Mobile App Intelligence API // Interface to the 'Sensor Tower' API https://app.sensortower.com/api/docs/app_analysis for mobile app analytics and market intelligence. Provides a small, consistent set of functions to retrieve app metadata, publisher information, download and revenue estimates, active user metrics, category rankings, aggregate game market denominators, and market trends. Four core verbs ('st_metrics', 'st_rankings', 'st_app'/'st_apps', 'st_filter') cover the common workflows with standardized parameters and tidyverse- friendly output. Supports both iOS and Android app ecosystems with unified data structures for cross-platform analysis.