Happy Thanksgiving!
I am a developer of Intervallo timer that I created for myself as I didn`t find a good one for me in app store. Now I`d like to share it with you - itunes.apple.com/us/app/intervallo/id551457908?mt=8
It is free for a limited time. You will be able to create advanced intervals with sound schemes you want for convenient agitation process. Using Intervallo you can divide development time into intervals with autostart and assign them individual sound schemes for agitation. It is possible to create kind of a progressive sound schemes for progressive/regressive agitation.
Any comments, questions or reviews on appstore are welcome!