I just downloaded Fire.onion+tor from google play. Will this be acceptable or should I download tor alone, and can I download it on my android lollipop tablet? Thank you
It's recommended to only use the official apps to connect to Tor. If you use a 3rd-party app, nobody can guarantee that it isn't leaking traffic. And if you don't use the official Tor browser, it's easier to track through browser fingerprinting.
Download Orbot for Android here: https://play.google.com/store/apps/details?id=org.torproject.android
And use the Orfox browser with it: https://play.google.com/store/apps/details?id=info.guardianproject.orfox
To use Tor, just open Orbot, long press on the Onion logo to connect, and use the Orfox browser. If you're on a rooted device, you can use transparent proxying to route other apps through Tor, or you can try the experimental VPN feature.