Very detailed and precise entries, helpful semantics, clear font, very complete. Zoom feature really helps you see the character well. Don't waste your money on cheaper dictionaries that can lead you astray with impractical, obscure, obsolete, bookish, and imprecise definitions.
Update: I found that you can add supplemental dictionaries in the iPhone under settings> general> dictionaries and then adding the respective Chinese keyboard. Doing this you can select any character on the ultralingua dictionary and look up the traditional equivalent character through the dictionary. The current app does not allow this feature on any dictionary entries so you may have to select it in the search field where it should work. Found out that by selecting any Chinese phrase you can get native speech of highlighted text. Going to settings>accessibility>voices gives you more native speakers to choose from
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r2grt
Philippe331
Aeromistle