Mandatory mention of a cool related project: https://play.google.com/store/apps/details?id=com.iiasa.camaliot https://play.google.com/store/apps/details?id=com.

Mandatory mention of a cool related project: https://play.google.com/store/apps/details?id=com.iiasa.camaliot https://play.google.com/store/apps/details?id=com.iiasa.cama...