from http://www.digibytegaminghub.com/single-post/2017/01/10/Official-DigiByte-Road-Map-Released website;

" iOS SPV Wallet
 Regrettably Apple made the decision to remove the DigiByte iOS wallet from the iTunes store a few months back as well as the majority of all other
 cryptocurrency wallets.  We would like to get it back on the store as soon as possible. If anyone has any suggestions on how we might be able to make this
 happen please let us all know. Apple refused to tell us why they removed the wallet and rejected all our appeals to keep it on the store. "