Already:睡眠アプリ・自然音と癒しの音で睡眠導入・快眠
For The Better · App Store · Store page
Rank #20 in Japan, top free, Health & Fitness on Nov 6. Tracked in 2 charts over 1 day.
Rank history for this app starts Nov 6. A line chart appears once it has two days of data.
Where it ranks