> ## Documentation Index
> Fetch the complete documentation index at: https://docs.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.

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](https://docs.xbox.com/services/playfab/data-analytics/learn-data/reports/thirty-day-new-user-retention-report.md), 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](https://docs.xbox.com/services/playfab/data-analytics/learn-data/reports/metrics-and-terminology.md).

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