Is their an app (Android and iOS) to maintain my WordPress website?

Yes off course. It’s available.

Android WordPress app is available in the play store.iOS WordPress app is available in the App Store.

Play store link: https://play.google.com/store/apps/details?id=org.wordpress.androi d

iOS App Store link: https://apps.apple.com/us/app/wordpress/id335703880

   How to configure a WordPress website?

  1. after installing from Play store or app store -> open the WordPress app
  2. click on the “my site” icon -> click on the (+) symbol -> click on add self-hosted site.
  3. Enter the website name and it will check for the website and will show the another
  4. Enter the username and password of the WordPress site.
  5. Ant that’s it . You can now click on the sites pages and post and media and comments to see your website.
  6. You can also add more than one WordPress website to mange post and pages.