Sound quality has reduced terribly....i can prove it because when i downgrade the app to older versions sound improves immensely...actually app is getting heavier day by day because of updates and it consumes ram and battery which reduces sound quality.. I am using IPhone se 2nd generation... Older smule verion was better.. You can introduce smule lite app.. Like facebook lite.. And u can leave the option on user which version they want to use... 80 percent people care for voice not colours.