Definitions of terminology used by Sensor Tower

Difficulty Score

The Difficulty Score determines how hard it is for an app to be ranked at the top for a given keyword.

Our difficulty score is made up of a few factors:

  • Number of apps ranking for this term
  • Number of downloads the top apps have
  • Number of reviews and ratings the top apps have
  • Traffic Score
  • How much movement there is among the top search results
  • A few other small factors

These factors combined determine how hard it is to rank in the top search results for a given keyword. None of these factors are directly related to a specific app, so the difficulty score is actually attributed to the keyword.

A lower difficulty score means it will be easier to rank in the top search results when this keyword is searched. The difficulty score is on a logarithmic scale (base 10) from 0-10, with 10 being the most difficult. Apps with a higher number of downloads may find it easier to go after keywords with a higher difficulty score.

Keywords with historically very low traffic may not have a Difficulty Score. However, if a keyword is tracked by any Sensor Tower user, we will start collecting the relevant data and make its Difficulty Score available to all users by default.

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