I've been studying Hebrew for years, and love this app. It's true that not every single Hebrew verb is included, but even for the advanced student, veryln few are missing. The look-up is so easy - you type in ANY form of the verb, even the tsivui (imperative) or the future feminine plural, and a list comes up of that spelling in every binyan (one of the seven verb patterns) in which it occurs. Look for the name of the binyan you're working with, click on it, and you get the entire layout of that specific verb in that specific binyan, including very clear nekudot (vowel pointings), its shoresh (root), and if indicated, the letter of the root which causes a deviation from the normal pattern of the binyan. You don't have to figure out the past masculine singular form of the verb to begin the search, as is the case with other verb tables. Heck, just give it the infinitive if you feel like it!
I haven't picked up an old-fashioned luach (table) since the first day I downloaded this one. If you're at the beginning of learning Hebrew, ask your teacher to show you the names of the binyanim, and then help you see where they are listed when you look up a verb. When you are able to do that, you can use the app for as much as you'll need in the beginning. As you learn more Hebrew, you'll begin to use the more advanced parts of the information provided, in a natural way.
This could possibly be the best spent money to advance your studies, besides a good teacher or Israelis to hang out with!