If the app randomly closes when you do something, please could you send me an email to checkin@apptimal.uk straight away and let me know what you were doing and what phone you have so that I can track down the issue and resolve please?
I am aware of random errors occurring but as yet I have been unable to replicate or work out where they are coming from so your help in identifying the cause so that I can fix it for everyone would really be appreciated.
Thank you.