Question2Answer Clients
QtoA-Mobile by Jacksiro254 is a new mobile app client for Question2Answer sites made using Flutter 2.0 framework which means you can publish to either Android or iOS which uses qa-api, a simple Q2A custom API. To use QtoA-Mobile, you need to build qa-mobile flutter app for your site using Android Studio / Visual Studio Code as per your needs then clone qa-api to the root directory of your Q2A site.
Older Android clients include: Q2A client for Android by NoahY and Q2A Android client by Arjun. Both require the XML-RPC plugin to be installed on the Q2A site you're using with permission given to users in Admin page.