Folks at our shop have used Pendragon with some success. However, we've recently had a programmer develop one for us; it has greater flexibility and design for research protocols. I can explain more if you're interested.
Thank you, yes! I'd be very grateful - research grants being somewhat scarce at present (!), and my participants will likely use android rather than apple.
I'm running it for beta-testing on my own personal iPhone and would not hesitate to use it in a study. Dunno if android version will exist immediately. It has not been widely advertised because it is on the threshold of "finished."
I don't know if you are still looking for an EMA app for Android, but I have been involved in creating a new EMA app system that runs on both android and iPhones. If you are still interested visit this website: lifedatacorp.com. You can sign up, login and create EMA protocols from this site. Let me know if you have any questions.