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How Unity calculates retention ?

Discussion in 'Unity Analytics' started by OUSS23, Sep 13, 2017.

  1. OUSS23

    OUSS23

    Joined:
    Feb 18, 2013
    Posts:
    3
    Hello!
    I want to improve the Day1 retention but I still not understanding how it is calculated in Unity Analytics, if we suppose that a player opened the game for the first time on 13/09/2017 at 20:00:00, must he open the game again between : 14/09/2017 00:00:00 - 15/09/2017 00:00:00 ? or : 14/09/2017 20:00:00 - 15/09/2017 20:00:00 ?

    thanks ^^
     
  2. APalomo

    APalomo

    Unity Technologies

    Joined:
    Aug 3, 2016
    Posts:
    692
    @OUSS23,

    Unity Analytics uses the N-day retention model (or Classic Retention). So the calculation for Day 1 retention:
    "The number of New Users playing exactly 1 day after their first session divided by the total number of New Users exactly 1 day ago."

    All calculations are based on midnight UTC, so it would be the first option in your example. (Technically it would be 14/09/2017 00:00:00 - 14/09/2017 23:59:00)
     
    OUSS23 likes this.