Based on the users' reviews on the Apple App Store, here are the conclusions: **Pros:** 1. "Easy to use, great for whitening teeth and fresh breath, highly recommend!" 2. "Love the variety of procedures and customizations, makes it fun and relaxing." 3. "Works wonders for me, reduced sensitivity and left my teeth feeling smooth." **Cons:** 1. "Limited functionality on older devices, need to upgrade for full experience." 2. "Occasional crashes and glitches, makes it frustrating to use." 3. "Not enough tutorials or guides, can be confusing for new users." Note: The cons are based on the users' feedback that is most commonly mentioned in the reviews.