There was a Flash Player for Android, but the app existed only as a standalone player for playing .swf files. A couple mobile browsers did include it as a plugin so Flash content over the web mostly worked, but performance and user experience were not great.

Also it was power hungry app that drain too fast battery.

I remember GPS while driving would drain your battery faster than it could charge; you'd have to make sure your phone was fully charged, then keep it plugged in while driving--and it would still die in under an hour. There's still things you can do on your phone today to drain your battery quite fast; taking video is one such thing--I had my 2yo phone die in me last week because it was recording in my pocket--as is trying to run actual software through termux, playing games for too long, etc.