Yes, many customers indicate that Procreate Pocket is worth it, especially at the sticker price of only $4.99.
According to their reviews in the Apple's App Store, out of 8.8K ratings, Procreate Pocket's average rating is still 3.9 out of 5 stars.
Mentioned in this answer
Procreate Pocket 3.0
The most versatile sketching, painting and illustration app