"小森林 - 提升专注改善睡眠" is an iPhone application designed to play white noise, which is not disruptive noise but rather a random signal power spectrum of the same unit. This type of noise contains frequencies that span the entire range audible to the human ear, aiding relaxation and sleep. Whether you need to concentrate on work amidst surrounding distractions or seek a peaceful environment for meditation, white noise can be a helpful tool.

Within 小森林, you have access to seven categories including forest, rain, flowing water, ocean, daily life, campfire, and temple, offering dozens of sounds to create various natural experiences. This app caters to individuals looking to focus on studying or work, those struggling with insomnia, individuals in noisy environments seeking respite, people dealing with anxiety or mental fatigue, and those practicing meditation to achieve inner peace.