Version 1.4.6 is crashing when I create a stack
Unfortunately a bug slipped through in version 1.4.5 and 1.4.6 causing it to crash on iOS 8 if you try to create a new stack.
There is not really any way around this, but we have submitted a fix to Apple, and it should be available very soon.
Sorry to anyone affected by the issue. We have removed the app from sale until the fix arrives to prevent people accidentally installing the problematic version.