Free42

The app ranks #1 for its primary terms (free42, hp-42s calculator, hp-82240) with traffic scores of 76, 52, and 46 respectively, driving the bulk of organic installs.

A quality score of 90% and a 4.8‑star rating from 3,257 reviews indicate strong user satisfaction, which boosts conversion rates and can be leveraged in store assets.

The app is not ranked in the Tools category, preventing exposure in category charts and limiting discovery from users browsing the category list.

Key terms such as "scientific calculator" (traffic 75, difficulty 91), "programmable calculator" (traffic 71, difficulty 43) and "graphing calculator" (traffic 67, difficulty 78) are not ranked, representing missed volume.

The low‑difficulty keyword "reverse polish notation" (traffic 37, difficulty 25) is unranked; targeting it can yield quick gains with minimal competition.

Plus42 shares three top keywords but trails in rankings; by capturing those shared terms more aggressively, Free42 can solidify its lead and pull additional traffic from competitor searches.