iFunctionGenerator

iFunctionGenerator by Black Cat Systems is currently holding a steady position on the App Store, with its best 30-day rank of #24 matching its all-time peak reached on 2026-08-03. The app's chart presence is narrow and concentrated in two markets: Macao, where it ranks between #24 and #35 on the Top Paid chart, and Hong Kong, where it sits at #46–#48. Movement across all listed positions is essentially flat — most entries show zero change, and the overall 30-day average of #24 confirms a stable, non-volatile trajectory. The app is not appearing in any other country's charts, suggesting a very limited geographic footprint despite a solid local ranking in these Asian markets.