Free nature sounds for sleep, focus and study

Yixiu (一休冥想) offers nature sounds, music and breathing for everyday rest, reading and focused work. The current collection has 64 sounds, with 21 free selections. The web player needs no account, has no ads, and includes 5, 15 and 30-minute timers plus one-minute Focus. Plus is purchased and verified by Apple in the iPhone and iPad app; installed versions may differ.