Firstly, it seems to be much irritating when your mobile rings during a meeting, business conference and other sensitive occasions. You may put your mobile on silence mode but sometimes you forget to do that.
Thirdly, assume you are in a crowded place and your mobile constantly rings in your pocket and you are unable to listen to the ringtone.
There are plenty of apps that do the same job, but they are very complicated, for such a basic and easy task you should just provide time and volume levels, that’s all.
Volume Scheduler v1.7 Apk