The slogan answer is easy: review every day. The real answer is more nuanced.
Daily review is usually ideal, but not every missed day means failure, and not every daily streak means the system is healthy. What matters more is the pattern your review history reveals over time.
The review history in Quran Life is useful because it turns a vague feeling into a pattern. Are you reviewing consistently but grading too generously? Are you skipping, then overloading? Are you only touching easy material?
Those questions matter more than the slogan alone.