Due to increased server costs and sync times, the doughwallet devs have decided to disable the receiving function, so you can't put anymore doge in. The developer stated in a blog post that alongside the sync times, he just feels burnt out with doughwallet. If you have any funds in doughwallet, transfer them out immediately! If you really need an iOS wallet, there are many others on the appstore, such as Coinomi or Jaxx
EDIT: Since the sync times are so long in the doughwallet app, the dev has made a recovery tool so you can get the private key and use another wallet. It is available on his website.
EDIT 2: I was wrong, freewallet was the only other one I could find. I've linked 2 different ones.