Glad to know others are bothered by this small detail. My son thought I was silly to care about it. But, if you use an app frequently, and have to hear a RUDE sound every time you use it, it can get irritating. I ended up actually purchasing another timer from the Play Store. $2.00 I think. Well worth it. It's called Alarm Clock Xtreme by Innovation Labs (AVG.) Actually, there's nothing "Xtreme" about it. It's just an ordinary clock, timer, stop watch with a long list of sound selections for the timer. It has the roller type number selection which is slower to set than the keypad which Samsung still offers along with the roller option.
I think that the roller clock option is a "cute" gimmick first used by Apple. When I saw it originally, I thought, wow, how neat. But, over time, I realized that just setting numbers the old way using a number pad was quicker. "If it ain't broke, don't fix it!!!"
Bill Phillips
Durham, NC