This app is based on an idea developed by Gomo Tulku and Lama Shenpen Rinpoche.
The idea was inspired by an example of the great Kadampa Geshe Ben Gungyal.
As Lama Zopa Rinpoche says: "We can practice like Atisha's disciple, the Kadampa yogi Geshe Ben Gungyal, did. He kept a collection black and white stones. Whenever the thought of the eight worldly dharmas arose he'd put down a black stone and whenever he had a virtuous thought he'd put down a white one. He'd do this throughout the entire day and last thing at night would check to see how many stones of either color there were. At the beginning there were not white stones at all, only black ones. Gradually, however, there were a few white stones and then a few more. Eventually, after a long time, he found nothing but white stones. So it's all a matter of training; we can't expect it to happen quickly. It all depends on continual energy, determination and practice."