If you would like to find out what version of Grindr your are currently using, you can do so by tapping into your profile from your cascade screen, tapping on the settings 'cog' symbol and scrolling to the bottom of the settings menu once it appears.
The version of Grindr that you have installed should be displayed here.
All updates to Grindr will are made available for download via Google Play Store.
If a new update is available it will appear in the My Apps section of Google Play.
You can find the My Apps section by clicking the menu button on your device while in Google Play.
All applications installed on your device will populate the list and any available updates will be displayed in the Updates category.
You can install all available updates by simply tapping the update or update all button on your screen.
Note: Each Android device may display this information slightly different but following the steps above to find the My Apps section should be the same for all Android devices.