How do I track app usage on Android?

Google Play Store has a section for free apps. We can see the total downloads and total time spent by the user. Does it contain any further information about the installed applications?

I think the answer is there are some other important statistics which may be of help to all android developers. These are available at Android SDK Statistics page. Check out the following graphs.

And one more thing I would like to mention is you should definitely take the app usage statistics with a pinch of salt. Google Play Store only shows the usage stats to verified users.

How do I track my app usage?

You can use the Google Play Billing Library to track your app usage and generate reports. You can find more information about this library in the Android Developer documentation. Does Google Play charge me for my app purchases? You only pay if you choose to enable Google Play Billing for your app. If you opt out of Google Play Billing, then you don't pay anything for your app purchases. How do I manage in-app purchase transactions? In-app purchases are handled automatically by Google Play. You don't need to do anything special.

When will my app be listed in the Play Store? Google Play makes your app available to users once it's been approved and published. How long does it take to get my app in the Play Store? It can take up to 24 hours for your app to appear in the Play Store. Can I update my app in-app without creating a new version? Yes. All the features of your app can be updated via an in-app update.

How do I release an update to my app? Updates are automatically rolled out to users of your app. There is no separate release process.

How can I know if my app is still being downloaded by users? Use the Google Play Billing Library to track your app usage and generate reports. Can I advertise to users of other apps in my app? You can use the Google Play API to communicate with other apps. How do I find out who has downloaded my app? Does Google Play have a web API? Use the Google Play Developer API. What languages does Google Play support? Google Play supports any language that's supported by the Android SDK. Do I need to provide any kind of support for my app in a certain language? No. Google Play provides a translation service that translates your app's user interface. You don't need to provide any special support.

Why is there no app in the Google Play Store? Your app might be missing because it hasn't been reviewed yet. How do I submit an app to Google Play?

Can I see app usage history on Android?

I'm looking to get some information about app usage. I want to know which apps my children are using, how often they're used, etc. Can I access this information on Android?

There's no way to do that in the way you've stated. However, there are ways of doing this that involve rooting your device. If you have root access, you can install Xposed module that will provide you with several options. Here's a tutorial to get you started.

Another option is to use UsageStatsManager. This is not as flexible, but it might be easier to use. There's a detailed guide on how to use it here.