I recommend the Daiso foundation brush.

The product I am currently using is a foundation brush from Daiso. Since the bristles are wide, I find it useful for applying foundation and blush, or for contouring specific areas. It is also useful for applying powder as the final step of your makeup routine. Furthermore, considering its low price (3,000 won), it offers excellent value for money, and I really like that the bristles hardly shed compared to other brushes. It also feels soft with absolutely no rough texture. The only downside is that because the bristles are wide, they pick up a large amount at once, so you need to control the amount carefully. You can perfectly control the amount by tapping the brush against the cap of the blush product before dabbing it on your cheeks. For hygiene reasons, it is recommended to wash it frequently. I highly recommend it! Since it can be used for various purposes, I suggest buying several to use.