Excellent

With the ability to buy (for $2 each) comprehensive lists for the Old and New Testaments (Hebrew and Greek respectively, of course), this app is a great way to gradually familiarize yourself with the vocabulary of the Bible. It has an excellent system that introduces new, rarer words once more common words have been learned. Easily worth $4. It also allows you to focus on the Latin of a part of the Summa and the Greek of Romans, which are very nice features.

MLSVA about iDoms Vocab