It is actually pretty simple to write both alarms and timers and prontoscript, using global variables to control the processing, and taking advantage of the fact that the pronto wakes up for a second every minute. An example 'alarm' in my configuration: each night, my Pronto gets the sunrise time from the Internet and x minutes before sunrise opens my curtains and, if the temperature is below a certain point, switches on my heating. An example timer: the heating is automatically switched off x minutes later. Both are controlled by a script which runs in that second every minute that the Pronto wakes up for and it works perfectly, even if I am using the Pronto at the time. The only issue I have found is if the Pronto goes back to sleep in the middle of processing but I can stop this happening by 'pressing the backlight button' in those parts of the script that can take noticeable elapsed time.