Scripturial is designed primarily for a complete beginner, each unit is carefully designed to build on the words and concepts in the previous unit. However, the app does not force people to begin at Unit one. You are free to jump in at any unit.

If you have some experience under your belt, I would still encourage you to complete most of the units. I will endeavor to explain why in this article.

Each unit is designed so that it should take the average complete beginner approximately 3-5 minutes. For someone relatively comfortable with Biblical Greek, you should be able to complete the early lessons in approximately about 1-2 minutes each, so the time cost for completing the early lessons is not excessive, but why complete them?

1. Most people with a strong vocabulary have not yet fully developed their listening skills. If you choose a bible passage where you know all, or most of the words, can you follow along to an audio recording, and can you comfortably read that passage at the speed you can read in English? Many of the questions present text and audio. A transition occurs where at the start you need to read and listen; but as you progress, you may find you can answer the question based on just listening to it read out loud, rather than reading the text. Developing the auditory language part of the brain seems to have benefits in improving your general language competence.
2. Each unit focuses on a different basic Biblical Greek question skill. For example, in unit one, the focus is being able to read or listen to a Greek question and answer Yes or No in Greek. This skill then becomes assumed in the next unit. Over time you should be able to read and answer a range of questions in pure Koine Greek (What, Who, Where, Why, etc...) The benefit of developing basic question skills means that you will be able to begin the early stages of thinking about Greek in Greek, and it enables for basic classroom vocabulary practice activities, "What is this? Where is the book? What is on the table? etc..."
3. As much as possible, lessons that contain potentially new grammar concepts, use only the well known core set of vocabulary items. The goal is to make sure that weaknesses in vocabulary does not intefer with being able to understand what is going on with the grammar.

So if you do have the time and patience for speed running the early lessons, then I would strongly encourage it. But if the lessons are frustratingly easy then you might consider a different approach, jump in at a few different places, try a few different topical lessons (Animals, Garden, School, etc....) to test out where you would like to start.