iPhone 6S Plus - adding a transaction doesn't allow me to enter a date

[ukrlw]

Hi,
Love the iCompta app, but think I may have found a bug in the iPhone app.
When looking at a transaction and I click to change the date, I do not get a date entry form appear, or a keyboard to be able to type on. It looks as though a calendar is trying to appear, but there are no options to select a date.
As a result, I cannot enter another date into that area.
Can you advise if there is anything I can do?
Many thanks,
Richard

[Angeman]

Try to push the home button twice and remove iCompta from the background apps then launch it again.