There are two ways to update your Harvest Hosts Android app.  You can edit your settings to enable automatic updates, or you can update the app manually.  Here are the instructions on how to do both of these:

Update individual Android apps automatically

 
  1. Open the Google Play Store app Google Play.
  2. At the top right, tap the profile icon.
  3. Tap Manage apps & device.
  4. Select Manage and then the app you want to update.
  5. Tap More More.
  6. Turn on Enable auto update.
When updates are available, the app updates automatically. To turn off automatic updates, turn off Enable auto update.

Update Android apps manually

To update apps individually or in bulk using the Google Play Store app on your mobile device:
 
  1. Open the Google Play Store app Google Play.
  2. At the top right, tap the profile icon.
  3. Tap Manage apps & device. Apps with an update available are labeled "Update available." You can also search for a specific app. 
  4. Tap Update.

Please note: When some apps get updated, they require new permissions. You may get a notification that asks whether you accept the new permissions.  Also, an app will sometimes require  you to restart your device to complete the install.