Hallmark Tower Defense on iOS – Kingdom Rush Frontiers HD Review

This is the best TD game I've played on iOS, and I've played many. Developers still update the game (August 2017), and continue to set the bar for iOS TD. Thanks, devs! Great art, music and gameplay with several challenging levels make for many fun hours spent saying "just one more."
Review by Soylent Jon on Kingdom Rush Frontiers HD.