This is very old card game, originally called "War". Now you can play on your smartwatch! App is available for smartphones too: Rules: In the basic game there are two players and you use a standard 52 card pack. Cards rank as usual from high to low: A K Q J T 9 8 7 6 5 4 3 2. Suits are ignored in this game. Deal out all the cards, so that each player has 26.
It's secure to download Cards Battle. RAdeffFactory developed the game that falls into the Card Games category. This application was downloaded and set up by over 100 users and the most recent stable release was on Aug 31, 2019.
The app has the overall rating 2.7 on Google Play. Get the free installer of Cards Battle 2.1 and have a look at users' reviews on Droid Informer.