Thanks Scott: That solved the problem
Suddenly after more tun a year without issues Evernote crashes after a few seconds on both my iPhone and my iPad. Yet it continues to work well on my Mac Pro. Following an old posting I deleted the Evernote from my iPons (4S), turned off the phone, turned it back on and reloaded Evernote but it did not solve the problem. Anyone have an idea what may have happened and how to repair it?