Popsugar Tech Relaxation Relaxing Mindfulness Apps 21 Apps That'll Help You Wind Down, Relax, and Be More Mindful 30 December 2018 by Elle Taylor View On One Page Photo 15 of 21 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 15 Sandbox Sandbox brings the colour-by-number approach to your device. You can subscribe for unlimited access. Available on Android and iOS. Previous Next Start Slideshow RelaxationSelf-CareMeditationAppsLife Hacks