Rules of Survival
One of the most popular battle royale games for Android and iPhone is Rules of Survival, but not for long. While it has tons of players, Most of them switched to PUBG Mobile or are now enjoying Fortnite on the beta.
Still, Rules of Survival is the best option right now for Android users. Everything is polished, the controls are easy to master, you have voice chat options, and much more. You'll drop into 8 x 8 km island and enjoy basically everything you love from PUBG and Fortnite.
They have the same style for weapons, run or fight, pick your weapons, jump for cover, and much more. Originally Rules of Survival had massive multiplayer battle royale fights with 120 players, but now they have even more.
A recent update increased the map size to 8 x 8 km, and now lets you join games with 300 players at a time. Yeah, pretty crazy, right?
Personally, I find more guns and ammo and have a better time in Rules of Survival than the new PUBG. Get tons of weapons, ammo, backpacks, health, shields, helmets, attachments and get to shooting. With over 100 million downloads, there's no reason you shouldn't try it. You won't be able to build like in Fort, but it's close on everything else.