Logo practice timer accustically and visually indicates the timing for the speech therapy excersises followed by the relaxing phase for the muscles inbetween. Your child can therefore focus on the correctness of the movements. It doesn't have to count the number of practice cycles anymore, which would consume the majority of concentration in that age. The simply design makes the usage of the app possible even for the child itself also the child should of cause be supervised at any times.
Your child can practice everywhere due to the built-in camera function (and not only in front of a mirror). Steady control is important to succeed in a timely manner. The camera is disabled by default leaving you the full control over the practice routine.
If you notice a disturbing behaviour or having ideas for improvements of logo practice timer, please feel free to email and I try to improve.