> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# thirty-day Retention Report

> Overview of the PlayFab Thirty-Day Retention report, tracking the percentage of all active player cohorts, new and returning, who come back over 30 days.

# Thirty Day Retention report

The Thirty day Retention report table illustrates how many of your players came back to the game within a 30-day period.

A new Cohort of players is formed every day, based on all the players (new and returning), who have logged in to your game on a given day (**Day 0**).

Cohort size is determined by the number of players within it. Then each cell shows the percentage of players **(%)** from a given Cohort who returned on each subsequent day.

The Thirty Day Retention report table illustrates how many of your players came back to the game within a 30-day period.

The example report shown below was generated on **1/24/2018**. It shows, for instance, that on **12/25/2017**, 1.38M users logged in.

![Thirty-day Retention Report](https://mintcdn.com/microsoft-4404708b/MjJ0-cTsb1bpaMcX/images/playfab/data-analytics/learn-data/reports/tutorials/thirty-day-retention-report-table.png?fit=max\&auto=format\&n=MjJ0-cTsb1bpaMcX\&q=85\&s=31b857d31363812bef2dfbcb955b70b8)

Then **61.85%** of them logged in the *next* day, and **55.85%** of them logged in *two days* later.

Finally, **18.6%** came back *30 days* later, which corresponds to the report generate date, **1/24/2018**.

This report, in addition to the [New User Retention Report](/services/playfab/data-analytics/learn-data/reports/thirty-day-new-user-retention-report), is especially useful when you are running a LiveOps event, and want to check its effect on boosting engagement of existing players. For additional details, see [Metrics and Terminology](/services/playfab/data-analytics/learn-data/reports/metrics-and-terminology).

## Populating the report

To populate this report, you need to register a player, and then have them log in several days in a row at least once.

This, however, will produce trivial results, (with **100%** retention for each day). Throwing more players into the process and skipping some days will produce more interesting results.

The following API calls may be used to log in:

* [LoginWithAndroidDeviceID](xref:titleid.playfabapi.com.client.authentication.loginwithandroiddeviceid)
* [LoginWithCustomID](xref:titleid.playfabapi.com.client.authentication.loginwithcustomid)
* [LoginWithEmailAddress](xref:titleid.playfabapi.com.client.authentication.loginwithemailaddress)
* [LoginWithFacebook](xref:titleid.playfabapi.com.client.authentication.loginwithfacebook)
* [LoginWithGameCenter](xref:titleid.playfabapi.com.client.authentication.loginwithgamecenter)
* [LoginWithGoogleAccount](xref:titleid.playfabapi.com.client.authentication.loginwithgoogleaccount)
* [LoginWithIOSDeviceID](xref:titleid.playfabapi.com.client.authentication.loginwithiosdeviceid)
* [LoginWithKongregate](xref:titleid.playfabapi.com.client.authentication.loginwithkongregate)
* [LoginWithPlayFab](xref:titleid.playfabapi.com.client.authentication.loginwithplayfab)
* [LoginWithSteam](xref:titleid.playfabapi.com.client.authentication.loginwithsteam)
* [LoginWithTwitch](xref:titleid.playfabapi.com.client.authentication.loginwithtwitch)
* `LoginWithWindowsHello`\<!-- [LoginWithWindowsHello](xref:titleid.playfabapi.com.client.authentication.loginwithwindowshello) -->


## Related topics

- [Reports quickstart](/services/playfab/data-analytics/learn-data/reports/quickstart.md)
- [Metrics and Terminology](/services/playfab/data-analytics/learn-data/reports/metrics-and-terminology.md)
- [thirty-day New User Retention Report](/services/playfab/data-analytics/learn-data/reports/thirty-day-new-user-retention-report.md)
- [Thirty-day New User Conversion Report](/services/playfab/data-analytics/learn-data/reports/thirty-day-new-user-conversion-report.md)
- [Daily, Monthly, and Rolling 30-Day Overview and Totals Reports](/services/playfab/data-analytics/learn-data/reports/daily-monthly-and-rolling-30-day-overview-and-totals-reports.md)