This is the simplest, least error-prone counter I could design.
It's meant to be perfect for tracking daily quotas like Weight Watcher points or glasses of water per day.
Error Proofing features:
1)Clicks and color changes tell you that your counter is working.
2)Reset button only works after being held for at least 1 second.
3)Pressing screen and holding for at least 1 second will undo the last count.