Sorry for this newbe question, maybe also in some extent OT.
Is it any (free) MQTT client for Android that can interface with flespi MQTT broker?
MQTT client
You can use mqtt-board https://flespi.com/tools/mqtt-board
Just open https://mqttboard.flespi.io/ in browser ;)
MQTT TILES on mobile is good ,
if you are looking for native android app with push notifications etc ,
look at
https://play.google.com/store/apps/details?id=com.kloudip.Hazer&hl=en&gl=US
and MQTT dash app works with Flespi MQTT broker
