I tried it and had to give up.
Evidently, I’m old school, and pronounce A, E, I, O, U as ay, eee, eye, oh, you.
So they’d show me a letter which I knew was pronounced “eee,” I’d play their audio example which said “eee” but they expected me to choose “i” as the answer to what the English equivalent is. Since I wasn’t prepared to relearn English according to some kind of phonetic system I neither know nor understand, I stopped using it.
Yeah! If other languages do not look and sound just like English then to hell with them! Right? Most non Germanic languages that use the Roman alphabet have much more logical use of vowels than English does.
Pronouncing A, E. O. U
English has several different sounds for each of those vowels. (compare bAy and bAt). So you already know the hard way of doing it. Spanish is almost entirely phonetic.
Traveling in Mexico with a friend who asked me how to pronounce Spanish, I gave him a quick lesson with a few simple rules and the vowel sounds. He orders lunch using his new Spanish reading skill and is doing well until he orders soup (sopa). Spanish for potato is papa. He orders, “crema de papá”. Putting the stress on the last syllable changed potato to father. The waiter dropped to his knees he was laughing so hard. I had to explain to my buddy what he had just ordered. ;o)