Was great, now no longer works – Cardiogram: HeartIQ MigraineIQ Review

I haven't been able to use this app in weeks, maybe over a month. It gives me the 'Still working...' message and never opens up. Used to be 5 stars, but it's now a dead app, so it gets 1 star.
Review by George Beecher on Cardiogram: HeartIQ MigraineIQ.