I'm trying yours out now, not with my DS, just kinda playing with it. I like how it suggest the target seconds. I think I will use this so I don't have to wait around for a whole minute and get more tries. Also, the beeps are consistent. Pikatimer uses the default system notification sound for the OS, which works, but not very well. Often times, I find that the beep from pikatimer isn't aligned with the clock. I have very good perception of rhythm in time, so I can hear the slightest changes in frequency of the beeps. Pikatimer, most of the time, will have the beats aligned, but when they aren't in time, it's next to impossible to determine where the second falls, thus you miss your delay. Muting is always an option, but I find it's better to have something audible to go by. Also, I like how yours subdivides the second for better accuracy.