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How is retention calculated?

Discussion in 'Unity Analytics' started by goonter, Sep 26, 2018.

  1. goonter

    goonter

    Joined:
    Aug 31, 2015
    Posts:
    81
    General question about N day retention in Unity Analytics: is it calculated with a per-user rolling 24 hour window? Or is each calendar day a cohort for the purposes of retention?

    The latter method is generally considered to be inaccurate because a user can visit the app at 11:59pm and then 12:01am and be counted as retaining for 1 day when they've really only been retained for a few minutes.

    Just curious how Unity does this because the docs don't go into that much detail about the calculation. Thanks!
     
  2. CharlesWard

    CharlesWard

    Unity Technologies

    Joined:
    Apr 19, 2017
    Posts:
    5
    It is the latter, per-day cohort method. While you are correct that this method has some inaccuracy, that inaccuracy is averaged out over a large number of users (and I think is far more efficient to calculate than a rolling window).
     
    goonter likes this.
  3. husamimate

    husamimate

    Joined:
    Oct 12, 2018
    Posts:
    5
    hi,
    i would like to use levels in my game. How do i go about it ?
     
  4. JeffDUnity3D

    JeffDUnity3D

    Unity Technologies

    Joined:
    May 2, 2017
    Posts:
    2,427
  5. husamimate

    husamimate

    Joined:
    Oct 12, 2018
    Posts:
    5
    game is ready, i just want to introduce Anaylitics Levels in it.
     
  6. JeffDUnity3D

    JeffDUnity3D

    Unity Technologies

    Joined:
    May 2, 2017
    Posts:
    2,427