1.You can set each sound's timing time (for example, 5 minutes later) and the number of plays (for example: 5 plays)! 2.The timer dialog box must remain displayed! 3.The timer will be delayed when the device lock screen is displayed until it is displayed normally!
Sound Recommendation
A Woman's Helpless SighNatural Lightning in The SummerOrderly Pace of The ProcessionContinuous Drip SoundSound of Rain(Rustling Rain)Sound of a Zebra(Emergency)Good Morning(Female) Sound EffectsEat Something Sound Laughter Sound Sound of Water Dripping
Soundany.comFunny Ringtones and Timer! Play and Countdown Online!
Sound of Water Dripping 
Ocean White Noise
River Sound
Hi, if you can share Soundany to friends, that Soundany will be faster development, thank you!