Visual Time Timer (com.leffeapps.caltimer) on Google Play
A visual aid time support for people with autism, special needs, ADHD, and anxiety problems.How it works:The countdown is started by touching one of the colored balls.Note that time intervals can be changed by touching the grey button down in the middle.While countdown is in progress the same button can be used to reset the countdown.The sound and vibration at the end is stopped by touching the screen.The countdown is automatically reset when leaving the app.For more features, please consider installing the premium version: Visual Time Timer - Premium.