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
Storm at Sea Sound EffectsSound of The Opera The Audience Laughed and CheeredSound of Thunder(Inclement Weather)Crowd BooingLoud Thunder NoiseFunny Kid LaughingFright Sound Effect Animal Sounds Sound EffectBiting Sound
Soundany.comFunny Ringtones and Timer! Play and Countdown Online!
Fright Sound Effect 
Animal Sounds Sound EffectBiting Sound 
Thunderstorm Sounds
Laughing Out Loud Sound
Hi, if you can share Soundany to friends, that Soundany will be faster development, thank you!