This is potentially a really useful tool but not quite polished ... yet

There is a lot to like about the verb conjugator. I have not looked carefully at the English conjugation functions, but the Spanish conjugations seem to be well done. I have not tested the database to see how comprehensive the verb coverage is, but all of the verbs I checked so far have been in the database.
The only real complaint I have is that the search functionality is not implemented as well in this product as it is in the companys dictionaries. This app requires the user to choose whether the search term is in English or Spanish, and it was sometimes awkward to switch back and forth between the languages if a search was performed in the "wrong" language. Sometimes the search seemed to break down completely, eg: when I searched for "apoyar" in Spanish the dictionary repeatedly found "añadir" instead. I could choose "apoyar" from the pick list, but not by doing a simple search. Curiously, if I searched for a conjugated form instead of the infinitive, the search worked just fine.
Also, although some of the other apps from this developer use a sort of "fuzzy logic" for matching search terms with words, this app does not seem to have that functionality, or if it does I have not seen it at work.
I looked for, but did not find, a built-in interface for submitting problem reports from within the app. That surprised me.
As a result, I consider the app as not quite polished, but the developer has a good track record of fixing problems found in its other apps and of making substantial improvements over time so I think this is going to end up being really useful.

Dr. Bill Osler about English Spanish Verbs