We recommend doing the tests regularly—once a day, if you can. The more you do them, the more data you will have on how your cognitive performance changes over time. Your daily lifestyle entries are associated with your test scores, so you can identify patterns in how variations in your life relate with your cognition, allowing you to make changes that benefit your brain.
If you miss a few days here or there, don't worry about it. The key is to take regular snapshots of your cognitive performance to see progress over weeks, months, and years.
Pro tip: set a reminder in your calendar or smartphone to take a challenge every day or two. For more tips, see our FAQ on how to make brain health a habit.