Quran Life does not treat daily portion as a random reading target. It starts from your active part and your completion window, estimates a word target for the day, and then snaps that target to a meaningful stopping point.
That snapping matters. The app prefers to stop at a surah ending when possible. If that does not fit, it looks for a rub boundary. If that does not fit either, it looks for a ruku boundary. If none of those fall within the target window, it falls back to the nearest ayah boundary.
So the daily portion is based on ruku and other structural logic, not only raw word count. The goal is not just to keep you busy today. The goal is to keep your current territory moving in chunks that feel finishable and repeatable.
This matters because many students either choose too little and drift, or choose too much and quietly stop being consistent. A good daily portion is not the largest amount you can survive for one day. It is the amount you can repeat long enough for the sound and flow of the surah to become familiar.