HomeAppsLifestyleKicker UApps like Kicker U Here are some great alternatives to Kicker U by Stillwater Designs : Speaker Box Lite ★3.7 Kicker 108 ★4.2 Learning Subwoofer Circuits ★3.3 Klipsch LowControl ★3.6 Subwoofer Bass test ★4.1 Ultimate Car Audio App ★4.6 Hifi-Apps Subwoofer Optimizer ★4.1 SVS ★3.4 Bass Generator. Subwoofer Test ★4.3 Episode MEGA Subwoofers ★4.3 Paradigm Subwoofer Control ★4.1 MartinLogan Subwoofer Control ★3.5 Subwoofer Bass volume booster ★4.6 Subwoofer Bass Booster Amplify ★4.7 Subwoofer Bass - Bass Booster ★4.5 SubZone ★4.7